Câu hỏi:

17/06/2026 353

I suppose they are very tired. They have been working all morning.


A. Because they have been working hard they are now very tired.



B. They must be very tired as they have been working all morning.


Đáp án chính xác


C. They can be very tired due to working all moming.



D. They were very tired because of a hard working moming.


Trả lời:

verified Giải bởi Vietjack

Kiến th ức: Động từ khuyết thiếu

Giải thích:

must be: chắc hẳn, chắc có lẽ

can be: có th ể (khả n ăng)

Tạm dị ch: Tôi cho r ằng họ rất mệt. Họ đã làm việ c cả buổi sáng.

A. Bởi vì họ đã làm việc vất vả cả buổi sáng nên bây giờ họ r ất mệt. => sai nghĩa

B. Họ ch ắc hẳn rất mệt b ởi vì họ đã làm việc suốt buổi sáng. => đúng

C. Họ có thể rất mệt do làm vi ệc cả buổi sáng. => sai nghĩa

D. sai ngữ pháp: were => must be

Chọ n B

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