John ____ this task yesterday morning, but I did it for him

Câu hỏi :

John ______ this task yesterday morning, but I did it for him. He owes me a thank-you.

A. must have completed

B. may have completed

C. should have completed

D. could have completed

* Đáp án

C

* Hướng dẫn giải

Đáp án C

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