5000 câu trắc nghiệm Tiếng Anh 9 có đáp án - Phần 9
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At last the bus came. We _________ for half an hour a. waited b. was waiting c. have waited

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At last the bus came. We _________ for half an hour

waited

was waiting

have waited

had been waiting

Giải thích

Chọn đáp án D