100 câu trắc nghiệm Thì quá khứ hoàn thành tiếp diễn (Past Perfect Continuous) có đáp án

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Her eyes were red. It was obvious that she ________ (cry).

17/100

Her eyes were red. It was obvious that she ________ (cry).

cried

have cried

had cried

had been crying

Giải thích

Chọn đáp án: D