Last month while we watched an exciting game on television in our living  room, the electricity went out.

Câu hỏi :

Last month while we watched an exciting game on television in our living  room, the electricity went out.

A. Last month

B. on

C. went out

D. watched

* Đáp án

D

* Hướng dẫn giải

Đáp án D

watched ---> were watching

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