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

They (wait) at the station for 90 minutes when the train finally arrived.

89/100

They (wait) at the station for 90 minutes when the train finally arrived.

Had waited

Had been waiting

Had wait

Waited

Giải thích

Chọn đáp án: B