Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions I saw an accident while I ________ my friend yesterday

Câu hỏi :

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

A. waited

B.  had waited     

C. was being waited

D.  was waiting

* Đáp án

* Hướng dẫn giải

“When” dùng để diễn tả 1 hành động đang xảy ra 1 hành động khác xen vào

Thì quá khứ tiếp diễn .

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