I’m sure that someone forgot to lock the door

I’m sure that someone forgot to lock the door

Đề bài: Rewite the following sentences that keep the same meaning.

I’m sure that someone forgot to lock the door.

A. Someone can have forgotten to lock the door.

B. Someone must have forgotten to lock the door.

C. Someone could have forgotten to lock the door.

D. Someone have forgotten to lock the door.

Lời giải:

Đáp án: B

Giải thích: must have VpII: nói về một sự việc chắc chắn đã xảy ra trong quá khứ

Dịch: Tôi chắc chắn rằng ai đó đã quên khóa cửa. = Chắc ai đó đã quên khóa cửa.