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

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 . could have completed           

D should have completed

* Đáp án

D

* Hướng dẫn giải

Phương pháp giải:

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