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

10/50

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

waited

had waited

was being waited

was waiting

Giải thích

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

Thì quá khứ tiếp diễn .