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问题 选择题

I go to bed ______ seven o'clock.[ ]

A. in    

B. at    

C. for

答案

答案：B

选择题
The Chinese government promised that under no circumstances ________ the efforts to provide universal and low­cost health care.
A．it would stopB．it might stop
C．would it stopD．might it stop
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单项选择题

水肿型营养不良(Kwashiorkor)主要病因______。

A．蛋白质摄入不足
B．能量摄入不足
C．蛋白质和能量同时摄入不足
D．以上都不正确
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