Question

Granny goes to bed________nine every day．

1. A.
   in
2. B.
   on
3. C.
   at
4. D.
   for

Answer 1

C
分析：句意是“在9点钟”，表示在某个钟点数，要用介词at．(延伸)1)表示时间也可用after，before，until，by．如：We won't have classes after 4：00 P．m．/He nevergets up before five o'clock in the morning．/I won't come home until seven o'clock today．/By eighto'clock yesterday evening，I had finished all my homework．2)at表示时间的另外短语：atnight/at noon/at the moment/at that time/at the age of eight．