Thursday, 8 October 2026

IDIOMS - QUESTIONS BASED ON STYLE IN RECENT COMPETITIVE EXAMINATIONS -- EXERCISES WITH ANSWERS & EXPLANATION

 




Here follow excercises of questions of idioms based on recent examination patterns1.


Choose the Correct meaning of the given idiom out of options.

EXERCISES

I

1.

To grasp at  straw

a) To win easily

b) To show courage

c) To try desperate measures

d) To make careful decision


2.

To make a last laugh

a) To succeed at last

b) To fail hopelessly

c) To Stay indifferent

d) To mock at


3. 

To go for a song

a) To be expensive

b) To be in trouble

c) To sing loudly

d) To be sold cheaply


4.

To oil the hinges of silence

a) To bribe someone to be quiet

b) To prevent secrets from spreading

c) To gradually break uncomfortable silence

d) To speak diplomatically in tense moments


5.


Cut no ice
a) To have no effect

b) To create trouble

c) To speak sharp

d) To stop something


6.

A Fair weather friend

a) A fast friend

b) A trusted person

c) A person with you in comforts only

d) A person in need


7

To throw in the towel

a) To boast

b) To give up

c) To work harder

d) To start afresh


8

To speak your mind

a) To express frankly

b) To lie

c) To gossip

d) To stay silent


9.

To jack up the rates

a) To increase prices

b) To drop prices

c) To stay unchanged

d)To sell everything


10

To jump the gun

a) To Fire a gun

b) To act prematurely

c) To act foolishly

d) To succeed quickly

  

II

 Select he correct meaning of the idiom from given options.

1. 
A toffee-nosed person
a) A person who is fond of sweets
b) A rich person who has a lot of money
c)  A person who considers himself of high society and looks down on others.
d) A person who considers himself right and perfect.

2
Weal and woe
a) Ups and downs
b) Shortcomings
c) Sorrow and joys
d)  and late


3.
Diamond in the rough
a) A leading personality
b) An unsophisticated person with potential
c) An easy task
d) An untidy person

4. 
Head and Shoulders
a) Worse than others
b) Much better than others
c)  An educated person
d) A well informed person

5. 
To have sticky fingers
a) To be suspicious
b) To feel disturbed
c) To be charged with
d) To have a tendency to steal

6.
To make one's mark
a) To distinguish oneself
b) To give impression
c) To make a countenance
d) To take a stand

7.
On the ball
a) To be inattentive
b) Quick response to changes going around
c) Not to understand the situation
d) Unaware of changes going around

8.
Milk of human kindness
a) Compassion
b) Bravery
c) Kindness
d) To be lucky

9.
To get wind of 
a)  To boast of
b) To recover from illness
c) To come to know some secret information
d) To know the trend

10. 
To cut corners
a) To save money and economise
b) To avoid someone
c) To go unnoticed
d) To have an edge over others 



III

From the given options select the correct meaning of the idiom used in the sentence. 

1.
On the sly

He leaked important information to the enemy on the sly.
a) to tell openly
b) to give written statement.
c) to tell through an agent
d) to give information secretly.

2.
To bite the bullet 


He decided to bite the bullet and accept the difficult assignment.
a) to fight bravely
b) to show courage 
c) to face difficulty bravely
d) to counter an aggression

3. 
To go against the grain

It goes against the grain for her to accept the injustice silently. 
a) contrary to someone's belief and nature.
b) against the wishes
c) ready to fight with someone 
d) always find fault with others 

4. 
To steal someone's thunder

She stole my thunder by presenting the project before I could present it.
a) To act against someone's wishes
b) To make a show off
c) To steal someone's belongings
d) To take credit for other's achievement

5
To hold a candle to someone

The experienced captain always hold a candle to the new players.
a) to give guidance to others
b) To have an envy with others
c) To make a fight with others
d) To be as good as someone else

6.
To cross swords with someone

The Principal and vice Principal always cross sword with eachother.
a) To have disagreement with someone.
b) To go hand in hand with each other
c) To make a competition with each other
d) To have grudges against each other

7.
To cut no ice with someone

These days the captain cuts no ice with the vice captain and takes his own decisions. 
a) To make someone very angry
b) To impress someone greatly
c) To have no effect or influence on someone
d) To resolve issues with someone

8. 
To make bricks without straw

He will have to make bricks without straw as he is lacking infrastructure and man power these days.
To work with inadequate resourses
b) To complete work before time
c) To construct a house of straw
d) To make a wrong decision

9. 
To beard the lion in his den

He dared to beard the lion in his den when he exposed the deals of the corrupt officer.
a) to make a futile attempt
b) to go against the wishes of
c) to go against a powerful person in his territory
d) to make a compromise with someone. 

10.
To strain at a gnat and swallow a camel

The new officer is in the habit straining at a gnat 
and swallowing a camel by ignoring his big
 mistakes and punishing smaller ones.
a) to take a wrong devidion.
b) to take bribe frim someone
c) to ignore big fault and punish smaller ones
d) to punish a person  for the fault he has not done.




1. To fall into line
a) Search something
b) Fuming and shouting
c) Straight path to walk
d) Adhere to rules

2. All wet
a) To get drenched 
b) To take bath 
c) To enjoy rain
d) Completely mistaken 

3.To keep a good table 
a) To keep home organised
b) To entertain someone 
c) To give sumptuous food
d) To have a good company

4. To get cold feet
a) To feel cold
b) To fall sick
c) To be afraid to do something
d) To cover feet with water

5. To put something on ice
a) To freeze something
b) To postpone some work to do later
c) To start work very slowly
d) To put off something permanently

6. Hanging by a thread/a hair
a) To get nervous
b) Not able to manage things well
c) Indicisive
d) To be in a precarious position

7. To Hit a dead end
a) To reach a situation that leads to nothing further
b) Not on speaking terms with someone
c) Not able to take any decision 
d) To go stray on a wrong path

8. Take one's hat off to someone
a) To get angry with someone
b) To walk very quickly
c) To show respect to someone
d) To show humility to someone

9. To make a beeline for
a) To put things in order
b) To show respect for someone
c)  To go straight towards some place

10. To take a cue from someone
a)  To take someone else's position
b)  To treat someone very important
c)  To be influenced by someone
d) To wait patiently for someone

Sunday, 4 October 2026

ACTIVE PASSIVE QUESTIONS -- BASED ON STYLE IN RECENT COMPETITIVE EXAMINATIONS -- EXERCISES WITH ANSWERS & EXPLANATION

 



https://web.telegram.org/a/#777000

ACTIVE PASSIVE EXERCISES WITH ANSWERS AND EXPLANATION


I

1.

It is customary to honour the captain of the winning team.

a)It is customary to the captain of the winning team to be honoured.
b)It is customary for the winning team to honour the captain.
c) It is customary to the captain of the team won to be honoured.
d) It is customary for the captain of the winning team to be honoured.

2.

On reaching there I found her combing her hair.

a)When I reached there she was combing her hair.
b) On reaching there, she was found by me combing her hair.
c) On my reaching there, she was found combing her hair.

d) When I reach there, she was found by me combing her hair.


3.

People think he is a wise man.

a) He was thought a wise man by people.

b) He is thought to be a wise man.

c) People think him to be a wise man.

d) People think him a wise man.

4. 


Sticking bills on this wall is prohibited.
a) People have prohibited sticking bills on this wall.
b) They have prohibited  sticking bills on this wall.
c) It is  prohibited for  sticking bills on this wall.
d) Bills are prohibited from being stuck on this wall.


5.


They have gone to see the exhibition.

a)They went to the exhibition to be seen.

b) They have gone for the exhibition to be seen.

c) They go to the exhibition to be seen.

d) They had gone for the exhibition to be seen. 


6.

It is rumoured that she has stolen his watch.

a)She is rumoured to have stolen his watch.

b) It is rumoured that his watch was stolen by her.

c) His watch is rumoured to had stolen by her.

d) It is rumoured that she stole his watch.


7. 

It is reported that he is a criminal. 


a) It is said that he is a reported criminal.
b) He is reported to be a criminal.
c) They report that he is a criminal.
d) People report that he is a criminal. 

8.

The robbers took away everything that was kept by the shopkeeper in his shop.

a)  Everything that was kept by the shopkeeper in his shop was taken away by the robbers.
b)  The robbers took away everything  kept by the shopkeeper in his shop.
c) Everything kept by the shopkeeper in his shop was taken away by the robbers.
d) Everything that  the shopkeeper kept  in his shop was taken away by the  robbers.

9. 

In the morning, I noticed that the door had been left open the previous night.


a) In the morning it was noticed by me that the door had been left open the previous night.
b) In the morning I noticed  that someone had left the door  open the previous night.
c) In the morning I noticed  that they had left the door  open the previous night.
d) In the morning I noticed   the door  left open the previous night.


10. 

I did not know that your request had been turned down. 

a) It is not known to me  that your request has been turned down.
b) I did not know that they had turned down your request.
c) I did not know that someone had turned down your request.
d) I did not know that someone has turned down your request.



II

1. 

Ration and clothes for flood victims were dropped from helicopter.

a)  The authorities dropped ration and clothes from helicopter.

b) The authorities dropped ration and clothes for flood victims from helicopter.

c) Helicopter dropped ration and clothes for flood victims.

d) They dropped ration and clothes for flood victims from helicopter.


2.

People lined up the road.

a) The road was lined with people.

b) The road was lined up with people.

c) The road is lined by the people.

d) The road has lined with the people.

3. 

No reason for the power failure has been assigned.

a) They do not assign any reason for the power failure.

b) They did not assign any reason for the power failure.

c) They have not assigned any reason for the power failure.

d) Power failure has not been assigned any reason.

4.

 Flowers spread fragrance by their sheer presence.

a) Flowers are spread fragrance by their mere presence.

b) Fragrance has been spread by flowers by their sheer presence.

c) Fragrance is spread by sheer presence of flowers.

d) Fragrance be spread by sheer presence of flowers.

5. 

His pleasing nature has popularised him among his colleagues.

a) He is popularised among his colleagues by his pleasing nature.

b) He was  popularised  among his colleagues by his pleasing nature.

c) He has been popularised among his colleagues by his pleasing nature.

d) He has been popular among his colleagues by his pleasing nature.

6. 

The culprit is suspected to have been killed in an encounter. 

a) It is suspected that the culprit was killed in an encounter.

b) It was suspected that the culprit is killed in an encounter.
c) People suspect that the culprit has been killed in an encounter.
d) They suspected that the culprit was killed in an encounter.

7. 

It is now learnt that his brother was slain. 

a) His brother is slain is learnt by  us now.

b) His brother was slain was learnt by us.

c) It is now learnt that someone slew his brother.

d) It was now learnt that somebody slew his brother.


8.

He will present a beautiful present to the present chairperson. 

a) The present chairperson is presented a beautiful present by him.

b) A beautiful present will be presented to the present chairperson by him.

c) The present chairperson has been presented a beautiful present by him.

d) The present chairperson was presented a beautiful present by him.


9. 

I want to take my parents on pilgrimage by train.

 a) I wanted my parents to take on pilgrimage by train.
b) I want my parents to take on pilgrimage by train.
c) I want my parents taken on pilgrimage by train

d) I want my parents to be taken on pilgrimage by train.

10.

Her habit of verifying everything before use has earned her the confidence of her colleagues. 

a) The confidence of her colleagues has earned by her habit of verifying everything before use.
b) Her habit of verifying everything was earned him the confidence of her colleagues.
c) Her habit of verifying everything has been earned by confidence of her colleagues.
d) The confidence of her colleagues has been earned by her habit of verifying everything before use.








ANSWERS

I

1. In option a  it is customary to the captain is wrong. In option b winning team is not to honour captain. In option c winning team has bern changed which is wrong.Option d is correct. It is customary to remain as it is.to honour to change to be honoured. Captain of the team to be in place of subject. It is customary for the captain......to be honoured.

2. In option a sentence is changed which is wrong. In option c by me is missing. In option d tense is changed. Option b is correct. Sentence is "I found her" it will change to She was found by me the remaining sentence will be added to it. On reaching there she was found by me combing her hair.

3. Verb Think will change to is thought. He is thought to be a wise man. Option a was is incorrect. In passivevoice verb is changed but in options c and d verb is not changed. Option B is correct.

4.Is prohibited shows that this sentence is in passive voice. Is and have prohibited is wrong. Option d is correct. Is sticking change to are being stuck.

5. Options a c and d are wrong due to change of tense. To see to be changed to to be seen. People have gone for exhibition..

6. OPtion b watch was stolen, option c had stolen and option d she stole are wrong. Option a is correct.

7. option a c and d are wrong. Option b is corect.

8. First part of this sentence is in active voice and second is in passive voice. Robbers took away everything will change to everything was taken away by robbers.Option a is correct. 

9. Here subject is missing had been left will change to had left. Someone had left the door open. Option b is correct.

10. Here subject is required. They is suitable subject. I did not know that they have turned down. Had been turned down will change to had turned down.


   II
1.In option a for flood victims is missing. In option d they is incorrect in comparison to the authorities. Helicoptor does not drop anything. Option b is correct.

2. For people lined up is used but for road lined is used. The road was lined with people. Is lined and has lined are incorrect. Option a is correct.









Saturday, 19 September 2026

ACTIVE PASSIVE QUESTIONS -- BASED ON STYLE IN RECENT COMPETITIVE EXAMINATIONS -- EXERCISES WITH ANSWERS & EXPLANATION

 



https://web.telegram.org/a/#777000

ACTIVE PASSIVE EXERCISES WITH ANSWERS AND EXPLANATION


 I

1.
Every year there are thousands of devotees  visiting the shrine to have a glimpse of the deity.


a) The shrine is visited by thousands of devotees every year to have a glimpse of the deity.
b) The shrine is visiting by thousands of devotees every year to have a glimpse of the deity.
c) The shrine is being visited by thousands of devotees every year to have a glimpse of the deity.
d) The shrine was visited by thousands of devotees every year to have a glimpse of the 


2.

I saw the doctor examining the patients in the clinic.


a) The doctor was seen being examined by patient in the clinic.

b) I was seen patients being examined by the doctor in the clinic.

c) The doctor was seen examining the patients in the clinic by me.

d) Patients were seen being examined by the doctor in the clinic.

 

3.

The rescue work was forced to be abandoned all of a sudden.

 

a) They forced them to abandon the rescue work all of a sudden.  

b) People force them to abandon the rescue work all of a sudden.

c) Circumstances forced them to abandon the rescue work all of a          sudden.

d) Bad weather forces them to abandon the rescue work all of a          sudden.

 

4.

The old man remembers nostalgically the old days spent here.

 

a) The old days spent here are remembered nostalgically by the old man.

b) The old days spent were remembered nostalgically by the old man.
c) The old days were spent here are remembered nostalgically by the old man.
d) The old days were spent here were remembered nostalgically by the old man.
    
5.

The crops standing in the fields were destroyed.

 

a) The animals standing in the fields destroyed the crops.

b) They standing in the fields destroyed the crops.

c) The heavy rains in the fields destroyed the crops.

d) Heavy rains destroyed the crops standing in the fields.

 

6.

I found Rohit laughing at him.

 

a) He was found laughing at Rohit by me.
b) Rohit was found laughing at him by me.
c) I found him being laughed at by Rohit.

d) Rohit was found being laughed at by me.

7.

The teacher failed to prevent the students from entering class room.

 

a)  The students were not prevented from entering class room by the teacher.  

b) The students could not be prevented from entering class room by the teacher.

c)  The students are not prevented from entering class room by the teacher.

d)  The students would not be prevented from entering class room by the teacher.


8.

The suspect who escaped from custody earlier has been arrested.

a) The suspect was arrested who escaped from custody earlier.

b) The authorities arrested the suspect  who escaped from custody earlier.

c) The police has arrested the suspect who escaped from custody earlier.

d) It is said that the suspect was arrested who escaped from custody earlier.

 

9.


The old man remembers his son escorting him to the temple.


a) His son is remembered being escorted to the temple by the old man.

b) His son remembers being escorted to the temple by the oldman.

c) The oldman remembers being escorted to the temple by his son.

d) His son is  remembered being escorted to the temple by the old man.


10. 

What cannot be cured must be endured.


a) What we cannot cure we must endure.
b) What you cannot cure you must endure.
c) What one cannot cure one must endure.
d) What you cannot  cure you should endure.




 II
 1.

Do not let fear overpower you.


a)  Let you not be overpoweÅ•ed by fear.

b) Do not let you be overpowered by fear.

c) Let yourself not be overpowered by fear.

d) Do not allow you to be overpowered by fear.


2.

Those who have completed their work may leave.


a) Those are permitted to leave who have completed their work.

b) Those whose work is completed may leave.

c) Those whose work was completed may leave.

d) Those whose work has been completed may leave.


3

It takes two to make a row.


a) It is taken two to make a row.

b) It takes two for a row to be made.

c) Two are taken to be made a row.

d) Two were taken for a row to be made.


4.

I saw him stealing her necklace.


a) Her necklace was seen being stolen by him.

b) I saw her necklace being stolen by him.

c) I saw  her necklace was being stolen.

d) He was seen stealing  her necklace.


5.

Man is believed to have descended from ape-like ancestors.


a) Someone believed that man has descended from ape- like ancestors.

b) They believed that man has descended from ape- like ancestors.

c) People believe that man has descended from ape- like ancestors.

d) Someone believes that man has descended from ape-like ancestor.

6. 

The leader kept the public guessing about the result.


a) The public was kept being guessed about the result by the leader.

b) The public is kept being guessed about the result by the leader.

c) The public kept the leader guessing about the result.

d) The public was kept guessing about the result by the leader.

7.

The jury had to reconsider the verdict before it was delivered.


a) The verdict had to be reconsidered by the jury before it was delivered.

b) The jury has to reconsider the verdict before it delivered it.

c) The verdict has to be reconsidered by the jury before it was delivered.

d) The verdict was to be reconsidered by the jury before it was delivered.


8.

The minister is believed to have misused his powers.

a) It is believed that the minister misuses his powers.

b) They believed that the minister misused his powers.

c) People believed that the minister misused his powers. 

d) People believe that the minister has misused his powers.

9.


I found the daughter helping her mother.


a)Her mother was found being helped by the daughter.

b) The daughter was found helping her mother by me.

c) I found her mother being helped by the daughter.

d) The daughter is found being helped her mother by me.


10.


She remembers her father taking her to the garden when she was a child.


a)She remembers her father  being taken to the garden when she was a child.

b)She remembers being taken to the garden by her father when she was a child.

c) She is remembered being  taken to the garden by her father when she was a child.

d) She remembered being taken to the garden by her father when she was a child.





III




1.

She was made to recite  a story to him.

a)He made her to recite him a story.

b)He made her recite a story to him.

c) A story was made to be recited to him by her.

d) He was made to recite a story to her.


2. 

God is believed to have created man inhis own image.


a)Man is believed to have been created by God in His own image.

b) God believed that He created man in his own image.

c) It is believed that God created man in His own image.

d) It has been believed that God created man in his own image.



3.

The whole house was filled with smoke and dust.


a)Smoke and dust filled the whole house.

b) Smoke and dust is filled in the whole house.

c) Someone filled the whole house with smoke and dust.

d) Smoke and dust was filled in the whole house.


4.

They could not prevent him from entering the house.


a)He was not prevented from entering the house by them.

b) They could not prevent his entry into the house.

c) He could not be prevented from entering the house by them.

d) He would not be prevented from entering the house by them.


5.

They could hardly manage their affairs, not even with the help of their friends and relatives.


a)They, their friends and relatives could hardly manage their affairs.   

b) Their affairs could hardly be managed by them,  not even with the help of their friends and relatives.

c) Their affairs were not managed by them, not even with the help of their friends and relatives. 

d) They were not able to manage their affairs not even with the help of their friends and relatives. 


6.
Climatic changes occurring in our country have greatly influenced our cropping patterns.


a)Our cropping patterns have been influenced greatly by climatic changes occurring in our country.
b) Our cropping patterns have greatly been influenced  by climatic changes occurring in our country.
c) Our cropping patterns are being influenced greatly by climatic changes occurring in our country.
d)Our cropping patterns have been influenced greatly by climatic changes being occurred in our country.

7.

To my surprise, the landlord paid nothing to the labourer.

a)To my surprise,nothing was paid to the labourer by the landlord.
b) To my surprise, the labourer was not paid anything by the landlord.
c) I was surprised that nothing was paid to the labourer by the landlord.
d) It was surprise to me that the labourer was not paid by the landlord.

8.

His father fears being dragged into controversy.

a)His father fears that someone is dragging him into controversy.
b) His father feared that someone is dragging him into controversy.
c) His father fears that someone was dragging him into controversy.
d) His father fears that someone will drag him into controversy.

9.

When I reached there, I found her waiting for me.
a)When I reach there she was found by me waiting for me.
b) When I reached there she was found waiting for me.
c)When I reach there she is found by me waiting for me.
d) On my reaching there she was found by me waiting for me.

10.

  I have to sit late in the office to complete my work.


a) I am allowed to sit late in the office to complete my work.
b) I am permitted to sit late in the office to complete my work.
c) I am obliged to sit late in the office to complete my work.
d) I have to sit late in the office for my work to be completed.




ANSWERS


I

1.  Option a) is correct. This sentence is a little ticklish. 'Every year' or 'every day'' takes Present indefinite tense with it. So 'there are' is used in this sentence. Its passive too should be with present indefinite tense.It cannot be Present continuous tense. Rest of the options 'is visiting', 'being visited' and 'was visited' are not correct.
2. Here the sentence is " I saw the doctor". It will change to "the doctor was seen". Add the remaining sentence as such. As per options In a)  "the doctor...was examined by patients" is wrong b) "I was seen" and d) "the patients were seen" are wrong. C) is correct.
3. The verb "was forced" shows that it is passive voice. "Was forced to be abandoned" will change to "forced to abandon". Here subject is missing. Circumstances is better than people and they. In d) tense is changed. So c) is correct.
4. In options bcd tense is not according to sentence.
Option a is correct. "The old man rememebers the old days" " the old days are remembered by the old man."
5."The crops were destroyed" Here subject is missing " We imagine "Heavy rains" It will be Heavy rains destroyed the crops..." So option d) is correct.
6.Here sentence is "Rohit laughing at him". Its passive is "he being laughed at by Rohit"
With it is "I found" here I is subject found verb and object is required. For becoming object "he" will change as "him". The sentence will be" I found him being laughed at by Rohit". Option c is correct.
7. In options c and d; tense of the sentence is changed. Option a shows that the teacher did it deliberately where as the sentence shows "failed to prevent" so "could not be prevented" is correct. It shows teacher's helplessness in action. Option "b" is correct.
8.In options a and d tense of the sentence is changed. In option b "has arrested" has been changed to "arrested" which ia wrong. Here the subject is missing. The police is suitable subject. C is correct.
9. The sentence is "his son escorting him" Its passive is "he being escorted by his son". So option c,  "the oldman remembers being escorted to the temple by his son"  is correct. 
10. Here sentence "to complete my work" has its passive " for my work to be completed". 


II

1. 'Do not allow' is incorrect.Option d is not correct. Out of the rest three 'yourself' is correct. It is like -- You do not allow to overpower yourself ... Let yourself  not allowed....option c is correct.
2. 'Is permitted' is incorrect. a is not correct. b and c tense is and was is used so these are incorrect. d is correct. 'has been completed' is correct.
3. Option d were taken is incorrect. option a 'It is taken' is incorrect. 'Two are taken ' is incorrect. Option b 'for a row to be made' is correct.
4.  '....him stealing her necklace.' 'Her necklace being stolen by him'  So according to this option b is correct.
5. "Man is believed" -The sentence shows it is believed at present also. So a and b options with past tense are incorrect. Someone does not suit well. Option c is correct.
6. The leader is subject kept is verb and public is object. The public was kept guessing.....by the leader. So option d is correct.
7. The jury is subject. had to reconsider is verb. the verdict is object. The verdict had to be reconsidered before it was delivered. Option a is correct.
8.'"is believed to have misused" shows that this sentence is in passive voice. So subject is required. Out of "it is they and people" people is better subject. Minister is believed shows that this sentence is in present tense ie prople still believe. So option d is correct.
9. Here we have to go by given options. Found will be was found. I found her mother being helped by her daughter is correct.So c is correct.
10. She remembers shows it is in present tense. So two options  of past tense are incorrect.  She remembers being taken is correct. "Her father taking will be being taken by her father."  So option b is correct.
 
III

1.Was made to recite is causative verb. To recite will change to to be recited. So "a story was made to be recited" to him by her. Option c is correct. The remaining options he made and he was made is wrong.
2. Is believed to have created will change to is believed to have been crearted. Man is believed to have been created by God. Option a is correct. God did not believe. It is or was believed are incorrect.
3. The whole house and smoke and dust will interchange their positions. was filled will change to filled. Smoke and dust filled the whole house.Option a is correct. Other options is filled and was filled and someone filled are incorrect.
4. could not prevent will change to could not be prevented. Option c is correct. was not prevented and would not prevent and his entry are wrong. 
5. They and their affairs will interchange their positions. Could hardly manage will change to could hardly be managed. Their affairs could hardly be managed. Option b is correct. option a is active. Were and were not able to are incorrect.
6. Climatic changes have influenced our cropping patterns. Our cropping patterns have been influenced by climatic changes. Option b is correct. Option c and d being influenced and being occurred are wrong. In option a adverb should be before verb.
7. Landlord and labourer will change their places. Paid nothing alays changes to not and anything. Paid nothing equals to did not pay anything and will change to was not paid anything. The labourer was not paid anything.Option b is correct.
8. Here subject is missing. being dragged will change  to is dragging. Someone is dragging him. Here with subject that is used. object him is added. His father fears that someone is dragging him. Option a is correct.
9. I found her will change to she was found by me. Add the rest of the sentence to it. She was found by me waiting for me. Option b is correct.
10. Am allowed, am permitted and am obliged to are incorrect. To complete my work will be changed to for my work to be completed. Option d is correct.