We started to write to each other three years ago.
A. We used to write to each other for three years.
B. We have written to each other for three years.
C. We wrote to each other since three years.
D. We used to write to each other in three years.
Giải bởi Vietjack
Đáp án đúng là: B
For+ khoảng thời gian
Since+ mốc thời gian
Dịch: Chúng tớ đã viết thư cho nhau được 3 năm rồi
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