Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions The teacher turned up after we_____________for him for over 30 minutes

6/50

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions

The teacher turned up after we_____________for him for over 30 minutes

waited

was waiting

have waited

had been waiting

Giải thích

Đáp án D

Cấu trúc: had been + Ving (thì quá khứ hoàn thành tiếp diễn)

"Thầy giáo đã đến sau khi chúng tôi chờ thầy hơn 30 phút."