100 câu trắc nghiệm Thì quá khứ hoàn thành tiếp diễn (Past Perfect Continuous) có đáp án
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Sam gained weight because he had been overeating.

99/100

Sam gained weight because he had been overeating.

gained / had overate

was gaining / had been overeating

gained / had been overeating

was gaining / had overeaten

Giải thích

Chọn đáp án: C