问题描述：
I used to——up late but now I am used
I used to——up late but now I am
used to——to bed early.
A.staying；go B.stay；going C.stay；go D.staying；going
I used to——up late but now I am
used to——to bed early.
A.staying；go B.stay；going C.stay；go D.staying；going
问题解答：
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