I ___ my keys; I don't know where they are. MCQ with Answer and Explanation

I ___ my keys; I don't know where they are.

A. was losing

B. have lost

C. lost

D. lose

Answer: Option B

Present Perfect.

This question belongs to: English Tenses

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Question #1 Report Error

I ___ the book you recommended.

A. read

B. have read

C. had read

D. am reading

Correct Answer: Option B

Explanation:
Present relevance → Present Perfect.

This question belongs to: English Tenses

Question #2 Report Error

The baby ___ now. Please be quiet.

A. sleeps

B. slept

C. has slept

D. is sleeping

Correct Answer: Option D

Explanation:
Action in progress at the moment → Present Continuous.

This question belongs to: English Tenses

Question #3 Report Error

She ___ her homework when I arrived.

A. was doing

B. has done

C. does

D. did

Correct Answer: Option A

Explanation:
Action in progress at arrival.

This question belongs to: English Tenses