20 câu Trắc nghiệm Tiếng Anh 12 Cánh diều Chuyên đề 14: Câu bị động (Passive voice)
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Most forests in other climatic areas________by human beings. A. have already been affecting B. have already been affected C. have already affected D. had already been affected

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Most forests in other climatic areas________by human beings. 

have already been affecting

have already been affected

have already affected

had already been affected

Giải thích

Chọn đáp án B