by I last saw Bob when I was in Ho Chi Minh City.
A. I didn’t see Bob since I was in Ho Chi Minh City.
B. I could see Bob if I was in Ho Chi Minh City.
C. I haven’t seen Bob since I was in Ho Chi Minh City.
D. When I was in Ho Chi Minh City, I saw Bob.
Xem đáp án
C là đáp án đúng
Lời giải:
Đáp án: C
Giải thích : chuyển đổi từ quá khứ đơn sang hiện tại hoàn thành.
