问题

I _________ stay up late. —Really I didn’t. ButI ______ working in the night.
A:am used to,am used to
B: used to, usedto
C:am used to,used to
D:used to, amused to
B: used to, usedto
C:am used to,used to
D:used to, amused to
正确答案是:
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