Those who participated in the experiment had to remain _______ all night.

Câu hỏi :

Those who participated in the experiment had to remain _______ all night.

A. awaken

B. awake

C. awaked

D. awoken

* Đáp án

B

* Hướng dẫn giải

Those who participated in the experiment had to remain awake all night.

Đáp án B. awake

Dịch: Những người tham gia thử nghiệm đã phải thức trắng đêm.

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