Choose the best answer.
As we (cross)_____ the street, we (see)_____ the accident.
A. crossed/saw
B. crossed/were seeing
C. were crossing/ were seeing
D. were crossing/ saw
Hành động đang diễn ra và kéo dài dùng thì quá khứ tiếp diễn.
Hành động xen ngang dùng thì quá khứ đơn.
Công thức: S + Ved/V2, when S + was/ were + V-ing
=>As we were crossing the street, we saw the accident.
Tạm dịch: Khi chúng tôi đang băng qua đường, chúng tôi nhìn thấy một vụ tai nạn
Đáp án cần chọn là: D
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