Choose the best answer to complete the sentence.
Travelling on mountains is really dangerous, so you _____ go alone.
should
can
must
mustn’t
Must: phải, được phép
Mustn’t: hàm ý bạn không được làm gì hoặc không có lựa chọn nào khác
Can’t: không thể
Should: nên
Đáp án: Travelling on mountains is really dangerous, so you mustn’t go alone.
Tạm dịch: Du lịch trên núi thực sự nguy hiểm, vì vậy bạn không được đi một mình.
Đáp án : D
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