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问题: 单选6

I used to _______ very late during the winter vacation but now I have got 
used to _______ up very early.
A. rising ; get B. rise ; getting
C. rise ; get D. rising ; getting
如果还是顽石点头,请注明原因,全部.

解答:

I used to _______ very late during the winter vacation but now I have got 
used to _______ up very early.
D. rising ; getting
used to doing sth ,过去常常做某事,这里to为介词,后面应该跟名词,故用动名词形式