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. coul...

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

Should have + past participle = đáng lẽ nên làm gì trong quá khứ, mà đã không làm

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