Having (A) finished his tem paper (B) before the deadline, (C) it was delivered to professor (D) before the class

Câu hỏi :

Having (A) finished his tem paper (B) before the deadline, (C) it was delivered to professor (D) before the class

A finished 

B before 

C it was delivered 

D before 

* Đáp án

C

* Hướng dẫn giải

Phương pháp giải:

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