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

Xem toàn bộ quiz

My sister’s roommate was upset. She ________ been waiting for an hour.

42/100

My sister’s roommate was upset. She ________ been waiting for an hour.

had

has

have

Giải thích

Chọn đáp án: A