100 câu trắc nghiệm Câu điều kiện có đáp án (Phần 1)
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If we __________ the window yesterday, it __________ so cold in here.

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If we __________ the window yesterday, it __________ so cold in here.

had closed / would not have been

closed / were not

have closed / had not been

closed / had not been

Giải thích

Chọn đáp án A