Câu hỏi :

He did not work hard. He failed the exam.

A Even though he failed the exam, he didn’t work hard.

B Unless he had worked hard, he would have failed the exam.

C If he had worked hard, he would have passed the exam.

D However hard he worked, he failed the exam.

* Đáp án

C

* Hướng dẫn giải

Phương pháp giải:

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