There was no one else at the post office. I_________in a queue.
Giải chi tiết:
Giải thích:
Needn’t have done: sử dụng khi một việc đáng lẽ ra không cần thiết phải làm nhưng đã làm (trong quá khứ).
must’t + V.inf: không được phép làm gì
need + (not) + V.inf: cần làm gì (need đóng vai trò là động từ khuyết thiếu)
need + to V.inf: cần làm gì (need đóng vai trò là động từ thường)
Chọn A do ngữ cảnh của câu ở thì quá khứ đơn.
Tạm dịch: Không còn ai ở bưu biện. Tôi không phải xếp hàng.
Đáp án: A
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