This kind of product has to be used _____ 3 days _____ purchase. 

Câu hỏi :

This kind of product has to be used _____ 3 days _____ purchase. 

A with in/ of

B on/ on

C by/ of

D on/ after

* Đáp án

A

* Hướng dẫn giải

Phương pháp giải:

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