Nam’s score on the test is the highest in the class; he _________ hard last night.

Câu hỏi :

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.

A. should have studied

B. may have to study

C. must have studied

D. could have studied

* Đáp án

C

* Hướng dẫn giải

Chọn C

“must have done st”: nhận định một việc đã xảy ra trong quá khứ 

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