20 câu Trắc nghiệm Tiếng Anh 12 Cánh diều Chuyên đề 12: Sự hòa hợp giữa chủ ngữ và động từ (Subject - Verb agreement)
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Last year, a great number of trees________to provide space for building the villa. A. is to cut down B. are cut down C. was cutting down D. were cut down

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Last year, a great number of trees________to provide space for building the villa. 

is to cut down

are cut down

was cutting down

were cut down

Giải thích

Chọn đáp án D