They were having fun while their mother (watch) them.

• Correct: They were having fun while their mother was watching them.
• Explanation: The past continuous ("was watching") is used to describe an action happening at the same time as another ongoing action.

He had already finished his homework when his friends (call) him.

• Correct: He had already finished his homework when his friends called him.
• Explanation: The past perfect ("had finished") indicates that the homework was completed before the past action (friends calling).

Tell Susan to be ready at 7.00 as soon as you (see) her.

• Correct: Tell Susan to be ready at 7.00 as soon as you see her.
• Explanation: The present simple ("see") is used after "as soon as" because it refers to an event that will happen in the future.

By the time dinner (be) cooked, I felt really exhausted.

• Correct: By the time dinner was cooked, I felt really exhausted.
• Explanation: The past simple ("was") is used after "by the time" to show the action completed before another event in the past.

David quit his job after he (find) a better one.

• Correct: David quit his job after he found a better one.
• Explanation: The past simple ("found") is used to show a completed action that occurred before another past action ("quit").

Peter waited until his parents (go) out before he (turn) up the volume of his CD player.

• Correct: Peter waited until his parents went out before he turned up the volume of his CD player.
• Explanation: Both verbs are in the past simple tense ("went" and "turned") because the actions are sequential in the past.

It makes me feel angry whenever I (hear) about him.

• Correct: It makes me feel angry whenever I hear about him.
• Explanation: The present simple ("hear") is used because "whenever" refers to a repeated action or general truth.

The washing machine will continue making that noise until we (get) someone to fix it.

• Correct: The washing machine will continue making that noise until we get someone to fix it.
• Explanation: The present simple ("get") is used after "until" to indicate a future action.

They had carved the pumpkin by the time the guests (arrive).

• Correct: They had carved the pumpkin by the time the guests arrived.
• Explanation: The past perfect ("had carved") shows that the pumpkin was carved before the guests arrived (past simple).

She will buy a bigger house as soon as the bank (give) her the loan.

• Correct: She will buy a bigger house as soon as the bank gives her the loan.
• Explanation: The present simple ("gives") is used after "as soon as" to refer to a future event.

While she (walk) down the street, a man attacked her.

• Correct: While she was walking down the street, a man attacked her.
• Explanation: The past continuous ("was walking") is used for an ongoing action when something else happened.

In spite of (A) broken (B) leg, she tried to walk (C) to the school to attend (D) lecture.

• Correction: In spite of her broken leg, she tried to walk to school to attend the lecture.
  • Explanation: "Her" is needed before "broken leg," and "to school" is the correct phrase.

Whenever (A) you will promise (B) to do something, you need (C) to keep (D) it.

• Correction: Whenever you promise to do something, you need to keep it.
  • Explanation: "Will" is not needed after "whenever"; use the present simple tense.

No (A) matter expensive how (B) this car is, he decided (C) to buy (D) it.

• Correction: No matter how expensive this car is, he decided to buy it.
  • Explanation: "No matter how" is the correct structure, and it should be followed by "how" (not "expensive how").

Bob decided not to get (A) that job in spite of (B) it.

• Correction: Bob decided not to get that job in spite of having it.
  • Explanation: "In spite of" is followed by a noun or gerund, so "having" is the correct form.

John has such (A) many things to do (B) that he has (C) no time to (D) do.

• Correction: John has so many things to do that he has no time to do them.
  • Explanation: "Such" is used incorrectly here. The correct expression is "so many."

Although (A) the traffic, we managed to arrive (B) at the meeting on (C) time.

• Correction: Although there was traffic, we managed to arrive at the meeting on time.
  • Explanation: "There was" is needed to describe the traffic, and "on time" is the correct phrase.

My sister is (A) too young (B) not to (C) volunteer work (D).

• Correction: My sister is too young to do volunteer work.
  • Explanation: "Too young to" is the correct structure.

In spite of (A) my father has retired (B) for (C) a year, he still helps (D) the company.

• Correction: In spite of my father having retired for a year, he still helps the company.
  • Explanation: "Having retired" (gerund) is correct after "in spite of."

I will (A) you ask (B) there until (C) you (D) work?

• Correction: Will I ask you to work there until you finish?
  • Explanation: The sentence needs restructuring for clarity.

I thought (A) Jim works (B) with (C) her, but (D) she doesn't.

• Correction: I thought Jim worked with her, but she doesn't.
  • Explanation: "Works" should be in the past tense ("worked") after "I thought."

Mary always behaves (A) childishness (B) despite (C) her (D) age.

• Correction: Mary always behaves childishly despite her age.
  • Explanation: "Childishness" is incorrect here. The adverb form "childishly" should be used.

Although (A) she (B) gave up smoking, she (C) decided (D) to do it.

• Correction: Although she gave up smoking, she decided to take it up again.
  • Explanation: The sentence seems to imply that she resumed smoking. "Take it up again" makes more sense in context.

She told me (A) that (B) her husband (C) to stop (D) working because she (E) missed.

• Correction: She told me that her husband had stopped working because she missed him.
  • Explanation: Use past perfect ("had stopped") for something that happened before another event in the past.

He has been (A) very clever (B) in his exam because of (C) he is smart and (D) creative.

• Correction: He has been very clever in his exam because he is smart and creative.
  • Explanation: "Because of" should be replaced with "because."

As soon as (A) will finish (B) that project, she will (C) home with (D) her husband.

• Correction: As soon as she finishes that project, she will go home with her husband.
  • Explanation: After "as soon as," use the present simple ("finishes") instead of "will finish."