People said they had demolished the building

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People said they had demolished the building.

The building was said to have demolished.

The building was said to have been demolishing.

The building was said to be demolished.

The building was said to have been demolished.

Giải thích

Chọn đáp án C

Giải thích : : câu bị động kép chuyển đổi từ cấu trúc: People + V1 + that + S V2 = S + be + V1-ed + to V2/ have V2-ed: người ta nói
rằng.... Hai động từ cùng thời nên dùng dạng to V