We ____ to Hanoi several times, but last summer we ___ there by train.
A. flew/went
B. has flown/went
C. have flown/have gone
D. have flown/went
several times: vài lần => từ cần điền thứ nhất diễn tả một hành động xảy ra nhiều lần từ quá khứ đến hiện tại nên ta dùng thì hiện tại hoàn thành: have flown
last summer: mùa hè năm ngoái => từ cần điền thứ hai diễn tả một hành động xảy ra trong quá khứ nên ta dùng thì quá khứ đơn: went
=> We have flown to Hanoi several times, but last summer we went there by train.
Tạm dịch: Chúng tôi đã bay tới Hà Nội vài lần, nhưng mùa hè năm ngoái chúng tôi đã đến đó bằng tàu hỏa.
Đáp án cần chọn là: D
I haven't eaten this kind of ‘food before.
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