You _____ the washing. My sister could have done it for you

Câu hỏi :

You _____ the washing. My sister could have done it for you

A needn't have done

B couldn't have done

C hadn't to do

D . mustn't have done

* Đáp án

A

* Hướng dẫn giải

Phương pháp giải:

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