The doctor took off the plaster that he (put on) ___________six weeks before.

Câu hỏi :

The doctor took off the plaster that he (put on) ___________six weeks before.

A had putted on

B put on

C putted on        

D had put on

* Đáp án

D

* Hướng dẫn giải

Phương pháp giải:

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