Câu hỏi :

They cancelled all flights because of fog.

A. All flights because of fog were cancelled.

B. All flights were cancelled because of fog.

C. All flights were because of fog cancelled

D. All flights were cancelled by them because of fog

* Đáp án

* Hướng dẫn giải

Chọn đáp án B

Giải thích : câu bị động thời quá khứ đơn

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