Câu hỏi :

He doesn’t study hard, so he can fail the exam.

A If he studies hard, he won’t fail the exam.

B If he didn’t study hard, he wouldn’t fail the exam.

C If he studied hard, he wouldn’t fail the exam.

D If he hadn’t studied hard, he wouldn’t have failed the exam.

* Đáp án

A

* Hướng dẫn giải

Phương pháp giải:

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