Here are the correct answers for each set:

Set 1

Last night, as I was reading (1) a book in my room, I suddenly heard (2) a loud noise outside. I rushed (3) to the window and saw (4) that a strong wind was blowing (5) through the trees. The sky turned (6) dark, and the clouds gathered (7) quickly. Just as I decided (8) to close the window, it started raining heavily.

Set 2

When the teacher entered (1) the classroom, the students were sitting (2) quietly in their seats. She placed (3) her books on the table and began (4) to write on the board. While she was explaining (5) the lesson, a latecomer knocked (6) on the door. He looked (7) nervous as he was waiting (8) for permission to enter.

Set 3

By the time we reached (1) the railway station, the train had already left (2). We ran (3) to the platform, but the station master told (4) us that the next train would arrive (5) in an hour. Since we had (6) no other choice, we sat (7) on a bench and waited (8) patiently.

Set 4

Yesterday, while I was walking (1) through the park, I saw (2) a group of children who were playing (3) near the fountain. They were laughing (4) loudly and chasing (5) each other around the trees. Just as I decided (6) to sit on a bench, an old man approached (7) me and asked (8) if I had the time.

Here are four sets of preposition-based fill-in-the-blank questions with answers for students to check

Set 1

(Fill in the blanks with appropriate prepositions.)

1. She is allergic to peanuts and dairy products.

2. The cat is hiding under the sofa.

3. He was late for school due to traffic.

4. They were talking on the phone for an hour.

5. The manager is responsible for handling customer complaints.

6. She insisted on paying the bill.

7. The police were suspicious of his behavior.

8. We are excited about our upcoming vacation.

   
   

Set 2

(Fill in the blanks with appropriate prepositions.)

1. The children were afraid of the dark.

2. He takes great pride in his work.

3. The car stopped suddenly at the red light.

4. She is married to a doctor.

5. The students are preparing for their final exams.

6. He apologized for his mistake.

7. The company specializes in software development.

8. They are worried about the results of the test.

   
   

Set 3

(Fill in the blanks with appropriate prepositions.)

1. He is addicted to video games.

2. The museum is famous for its rare artifacts.

3. She is interested in learning French.

4. The audience burst into laughter after the joke.

5. The teacher is strict about discipline.

6. I am not familiar with this area.

7. The athlete is dedicated to his training.

8. The key fits perfectly into the lock.

   
   

Set 4

(Fill in the blanks with appropriate prepositions.)

1. The restaurant is popular with tourists.

2. The parcel was delivered to my doorstep.

3. She is fluent in three languages.

4. The lawyer argued for the rights of his client.

5. The baby is dependent on his parents.

6. He is always curious about new technology.

7. The students were punished for their misbehavior.

8. The old man is suffering from a severe illness.

These answers correctly apply prepositional rules in each context.

Answers

Set 1

1. He finished his work. He went to sleep.

✅ b) After finishing his work, he went to sleep. (Correct because it logically connects the actions in a natural sequence.)

❌ a) He finished his work when he went to sleep.

• Incorrect because "when he went to sleep" suggests that he was sleeping and working at the same time, which is illogical.

❌ c) Since he finished his work, he has to sleep.

• Incorrect because "has to sleep" implies obligation, but the sentence is about a past event.

❌ d) Though he finished his work, he slept.

• Incorrect because "though" suggests a contradiction, which does not exist between the two actions.

2. It was raining heavily. We could not go outside.

✅ a) We could not go outside since it was raining heavily. (Correct because "since" explains the reason logically.)

❌ b) We could not go outside unless it was raining heavily.

• Incorrect because "unless" means "except if," which contradicts the sentence's meaning.

❌ c) We could not go outside because we wanted rain.

• Incorrect because it changes the reason for not going outside and alters the meaning.

❌ d) It was raining heavily, which is why we played outside.

• Incorrect because it contradicts the second sentence—playing outside is the opposite of staying inside.

3. The old man was weak. He managed to walk to the temple.

✅ a) Despite being weak, the old man managed to walk to the temple. (Correct because "despite" shows contrast appropriately.)

❌ b) The old man walked to the temple because he was weak.

• Incorrect because the sentence suggests weakness was the reason for walking, which is illogical.

❌ c) The old man was weak because he walked to the temple.

• Incorrect because it reverses cause and effect—the man was weak before walking, not because of it.

❌ d) The old man managed to walk to the temple as he was strong.

• Incorrect because it contradicts the original sentence—he was weak, not strong.

4. The teacher entered the room. The students became silent.

✅ a) The students became silent as soon as the teacher entered the room. (Correct because it logically expresses immediate action.)

❌ b) The students became silent unless the teacher entered the room.

• Incorrect because "unless" means "except if," which does not fit the context.

❌ c) The students became silent since they wanted to play.

• Incorrect because the sentence does not mention "playing"; it changes the meaning entirely.

❌ d) The students became silent when the teacher left.

• Incorrect because it contradicts the original sentence—silence happened when the teacher entered, not left.

5. I missed the bus. I had to take a taxi.

✅ b) I had to take a taxi since I missed the bus. (Correct because "since" correctly conveys the cause-and-effect relationship.)

❌ a) I had to take a taxi because I wanted to.

• Incorrect because the original sentence implies necessity, not desire.

❌ c) I missed the bus though I took a taxi.

• Incorrect because "though" suggests contradiction, but there is no contradiction between missing a bus and taking a taxi.

❌ d) I had to take a taxi if I missed the bus.

• Incorrect because "if" is used for hypothetical situations, but the sentence describes a past event.

6. The food was cold. We still ate it.

✅ a) Though the food was cold, we ate it. (Correct because "though" correctly expresses contrast.)

❌ b) Since the food was cold, we ate it.

• Incorrect because "since" suggests cause-and-effect, which does not make sense—the food being cold was not a reason for eating it.

❌ c) The food was cold unless we ate it.

• Incorrect because "unless" suggests a conditional situation that does not exist in the original sentence.

❌ d) The food was cold because we ate it.

• Incorrect because it reverses cause and effect—the food was cold before it was eaten, not because of eating.

7. She is very intelligent. She topped the class.

✅ b) She topped the class because she is very intelligent. (Correct because "because" logically explains why she topped the class.)

❌ a) She topped the class unless she was intelligent.

• Incorrect because "unless" implies a negative condition, which does not fit the meaning.

❌ c) She topped the class even though she was intelligent.

• Incorrect because "even though" suggests contradiction, which is not present here.

❌ d) She is very intelligent so she failed.

• Incorrect because it contradicts the original meaning—intelligence should lead to success, not failure.

8. He was not invited to the party. He felt disappointed.

✅ a) He felt disappointed since he was not invited to the party. (Correct because "since" explains the reason logically.)

❌ b) He felt disappointed if he was not invited to the party.

• Incorrect because "if" suggests a conditional or hypothetical situation, but the sentence describes a fact.

❌ c) He felt disappointed though he was not invited to the party.

• Incorrect because "though" suggests contrast, but there is no contradiction between disappointment and not being invited.

❌ d) He felt disappointed because he did not want to go.

• Incorrect because it contradicts the original meaning—if he did not want to go, he would not be disappointed.

  
  

Answers

Here are the correct answers along with explanations for why the incorrect options are wrong.

Set 2 – Join the sentences without using 'and', 'but', or 'so'.

1. She completed her homework. She went out to play.

✅ a) After completing her homework, she went out to play.

Explanation: This correctly indicates a sequence of actions—first, she completed her homework, and then she went out to play.

❌ b) She went out to play unless she completed her homework.

• Incorrect because "unless" means "except if," which changes the meaning and suggests she wouldn't play if she did her homework.

❌ c) She went out to play because she had homework.

• Incorrect because it contradicts the logical flow—having homework should prevent playing, not cause it.

❌ d) Though she completed her homework, she went out to play.

• Incorrect because "though" implies a contradiction, but completing homework and going out to play are not contradictory.

2. The guests arrived late. Dinner had already been served.

✅ a) Since the guests arrived late, dinner had already been served.

Explanation: "Since" correctly shows the reason why they missed dinner—it had already been served before they arrived.

❌ b) The guests arrived late because dinner had already been served.

• Incorrect because it reverses cause and effect—the guests' arrival was not caused by the dinner being served.

❌ c) The guests arrived late as dinner was about to start.

• Incorrect because it implies the opposite meaning; the dinner was over, not about to start.

❌ d) The guests arrived late though they had been invited early.

• Incorrect because it gives a different reason for their lateness (being invited early) instead of the correct cause (dinner was served already).

3. She worked hard. She succeeded in the competition.

✅ a) Since she worked hard, she succeeded in the competition.

Explanation: "Since" establishes a cause-and-effect relationship between hard work and success.

❌ b) Though she worked hard, she succeeded in the competition.

• Incorrect because "though" introduces a contrast, but working hard and succeeding are not contradictory.

❌ c) She succeeded in the competition unless she worked hard.

• Incorrect because "unless" means "except if," which makes no sense in this context.

❌ d) She worked hard because she succeeded in the competition.

• Incorrect because it reverses the logical order—she succeeded because she worked hard, not the other way around.

4. The child fell. He hurt his knee.

✅ b) The child hurt his knee since he fell.

Explanation: "Since" correctly shows the cause (falling) and the effect (hurting his knee).

❌ a) The child fell if he hurt his knee.

• Incorrect because "if" suggests a condition, but the sentence describes an event that has already happened.

❌ c) The child fell because his knee was hurting.

• Incorrect because it reverses the logical order—his knee hurt because he fell, not the other way around.

❌ d) The child hurt his knee unless he fell.

• Incorrect because "unless" means "except if," which makes no logical sense here.

5. We reached the cinema late. The movie had already started.

✅ a) Since we reached the cinema late, the movie had already started.

Explanation: "Since" correctly shows the cause (arriving late) and the effect (movie had already started).

❌ b) Though we reached the cinema late, the movie had already started.

• Incorrect because "though" implies contrast, but there is no contradiction between arriving late and the movie starting.

❌ c) The movie had already started unless we reached the cinema late.

• Incorrect because "unless" does not fit the meaning of the sentence.

❌ d) The movie had already started so we reached late.

• Incorrect because it reverses cause and effect—we reached late because the movie had started, not the other way around.

6. She studied well. She passed the exam with good marks.

✅ a) Because she studied well, she passed the exam with good marks.

Explanation: "Because" correctly shows the cause (studying well) and the effect (passing the exam).

❌ b) She passed the exam with good marks if she studied well.

• Incorrect because "if" suggests a condition, but the sentence is describing a fact.

❌ c) She studied well unless she passed the exam with good marks.

• Incorrect because "unless" changes the meaning and makes it illogical.

❌ d) She passed the exam with good marks though she studied well.

• Incorrect because "though" implies contrast, but there is no contradiction between studying and passing.

7. They saved money. They bought a new house.

✅ a) After saving money, they bought a new house.

Explanation: "After" correctly indicates that saving money happened first, then they bought the house.

❌ b) They bought a new house if they saved money.

• Incorrect because "if" suggests a hypothetical condition rather than a sequence of events.

❌ c) Though they saved money, they bought a new house.

• Incorrect because "though" suggests a contradiction, but saving money and buying a house are not contradictory.

❌ d) Since they saved money, they could not buy a new house.

• Incorrect because it gives the opposite meaning—saving money helps buy a house, it does not prevent it.

8. He was very tired. He continued working.

✅ a) Though he was very tired, he continued working.

Explanation: "Though" is correct because it shows contrast between being tired and still working.

❌ b) Since he was tired, he continued working.

• Incorrect because "since" suggests cause-and-effect, but being tired would not be a reason to continue working.

❌ c) He continued working because he was tired.

• Incorrect because it reverses the logical order—he should stop working if he is tired, not continue.

❌ d) He continued working unless he was tired.

• Incorrect because "unless" means "except if," which does not fit the meaning of the sentence.

  
  

Sentence Transformation

Answers

Set 1 –

1. He said, "I have completed my work." (Change into indirect speech)

✅ c) He said that he had completed his work.

Explanation:

• In indirect speech, the present perfect tense (have completed) changes to past perfect (had completed).

❌ a) He said that he has completed his work.

• Incorrect because "has completed" remains in the present perfect, which should be changed to past perfect in indirect speech.

❌ b) He said that he completed his work.

• Incorrect because "completed" is simple past, which does not correctly reflect the original tense change.

❌ d) He said that he is completing his work.

• Incorrect because "is completing" (present continuous) changes the meaning completely.

2. The dog chased the cat. (Change into passive voice)

✅ a) The cat was chased by the dog.

Explanation:

• In passive voice, the object (the cat) becomes the subject, and the verb changes to "was chased" (past simple passive).

❌ b) The cat chased the dog.

• Incorrect because it reverses the subject and object, changing the meaning.

❌ c) The dog was chased by the cat.

• Incorrect because it makes it seem like the dog was being chased instead of the cat.

❌ d) The cat is being chased by the dog.

• Incorrect because it uses the present continuous instead of past simple.

3. Unless you work hard, you will not pass. (Rewrite using 'if')

✅ a) If you do not work hard, you will not pass.

Explanation:

• "Unless" means "if not," so "unless you work hard" = "if you do not work hard."

❌ b) If you worked hard, you will not pass.

• Incorrect because "worked" (past tense) is incorrect for a future condition.

❌ c) If you do not pass, you will work hard.

• Incorrect because it reverses cause and effect; the sentence should be about how working hard leads to passing, not the other way around.

❌ d) If you will not work hard, you do not pass.

• Incorrect because "will not work" is incorrect in an "if" clause of a conditional sentence.

4. She is too shy to speak in public. (Rewrite using 'so...that')

✅ b) She is so shy that she cannot speak in public.

Explanation:

• "Too…to" can be rewritten as "so…that + negative clause" (too shy to speak → so shy that she cannot speak).

❌ a) She is so shy to speak in public.

• Incorrect because "so shy to speak" is grammatically incorrect; "so…that" requires a full clause.

❌ c) She is shy so that she cannot speak in public.

• Incorrect because "so that" means purpose, but the sentence is about inability, not purpose.

❌ d) She is shy such that she cannot speak in public.

• Incorrect because "such that" does not fit well in this structure.

5. The boy is very weak. He cannot lift the bag. (Combine using 'too...to')

✅ b) The boy is too weak to lift the bag.

Explanation:

• "Very…cannot" changes to "too…to" (very weak + cannot lift → too weak to lift).

❌ a) The boy is too weak so that he cannot lift the bag.

• Incorrect because "too...so that" is incorrect structure.

❌ c) The boy is very weak that he cannot lift the bag.

• Incorrect because "very weak that" is grammatically incorrect; it should be "so weak that."

❌ d) The boy is weak enough to lift the bag.

• Incorrect because "weak enough" means he can lift the bag, which is the opposite meaning.

6. The book is interesting. I want to read it again. (Combine using 'such...that')

✅ b) The book is such an interesting one that I want to read it again.

Explanation:

• "Such…that" is used with a noun phrase (such an interesting one that).

❌ a) The book is such interesting that I want to read it again.

• Incorrect because "such interesting" is grammatically incorrect; "such" needs a noun (e.g., "such an interesting book").

❌ c) The book is interesting such that I want to read it again.

• Incorrect because "such that" does not work in this transformation.

❌ d) The book is so interesting such that I want to read it again.

• Incorrect because "so interesting such that" is redundant and incorrect.

7. He was punished. He was careless. (Rewrite using 'because')

✅ a) He was punished because he was careless.

Explanation:

• "Because" correctly shows cause and effect (carelessness caused punishment).

❌ b) Because he was punished, he was careless.

• Incorrect because it reverses cause and effect; he was punished because he was careless, not the other way around.

❌ c) He was careless because he was punished.

• Incorrect because punishment does not cause carelessness; it's the opposite.

❌ d) He was punished because of careless.

• Incorrect because "because of" needs a noun (carelessness, not "careless," which is an adjective).

8. "What a beautiful painting!" she exclaimed. (Change into assertive sentence)

✅ a) She exclaimed that it was a beautiful painting.

Explanation:

• To convert an exclamatory sentence to assertive, remove the exclamation and restate it as a fact using "that."

❌ b) She exclaimed what a beautiful painting it is.

• Incorrect because "what a beautiful painting" is still in exclamatory form.

❌ c) She said that the painting was beautiful!

• Incorrect because "said" is weaker than "exclaimed," and the exclamation mark should be removed.

❌ d) She said what a beautiful painting.

• Incorrect because it's grammatically incomplete.