He went back to work in his country after he…….his course on Advanced Engineering in London.

Câu hỏi :

He went back to work in his country after he…….his course on Advanced Engineering in London.

A finishes

B has finished

C had finished

D was finishing

* Đáp án

C

* Hướng dẫn giải

Phương pháp giải:

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