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

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Keyla ________ for two hours before she arrived.

47/100

Keyla ________ for two hours before she arrived.

was driving

has been driving

had been driven

had been driving

Giải thích

Chọn đáp án: D