问题描述：
1.She has to go to bed ____ nine o'clock.A.afte
1.She has to go to bed ____ nine o'clock.
A.after B.in C.on D.by
2.She can't ____ the telephone.
A.answer B.get C.put D.ask
1.She has to go to bed ____ nine o'clock.
A.after B.in C.on D.by
2.She can't ____ the telephone.
A.answer B.get C.put D.ask
问题解答：
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