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

We (sleep) for 12 hours when he woke us up.

88/100

We (sleep) for 12 hours when he woke us up.

Had been sleeping

Had slept

Slept

Were sleeping

Giải thích

Chọn đáp án: A