单项选择（每题1分）—Look John’s fallen asleep at work!—Oh he must have late last night.A. waken

问题补充：

单项选择（每题1分）

—Look, John’s fallen asleep at work!

—Oh, he must have late last night.

A. waken up

B. put up

C. taken up

D. stayed up

答案：

A. waken up

B. put up

C. taken up

(答案→)D. stayed up

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