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

She ________ computer games for over ten years before she finally ________ a hit.

64/100

She ________ computer games for over ten years before she finally ________ a hit.

wrote / had had

had writen / had had

had been writing / had

had been writing / had had

Giải thích

Chọn đáp án: C