The old man ______ to hospital early. I think they did it too late

Câu hỏi :

The old man ______ to hospital early. I think they did it too late

A. must have taken

B. should have taken

C. must have been taken

D. should have been taken

* Đáp án

D

* Hướng dẫn giải

Đáp án D

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