Choose the best answer.
When we _______(cross) the street, we saw an accident.
A. have been crossing
B. had been crossing
C. were crossing
D. crossed
Giải bởi Vietjack
Hành động xen vào chia ở thì quá khứ đơn. Hành động đang xảy ra chia ở thì quá khứ tiếp diễn.
Công thức: when + S was/were + V-ing, S + Ved/ V2,
=>When we were crossing the street, we saw an accident.
Tạm dịch: Khi chúng tôi đang băng qua đường, chúng tôi đã nhìn thấy 1 vụ tai nạn.
Đáp án cần chọn là: C
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Choose the best answer.
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