问题
选择题
I _____ brushing my teeth twice a day. [ ]
A. am used to be
B. make it rule
C. used to be
D. have the habit of
答案
答案：D
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I _____ brushing my teeth twice a day. [ ]
A. am used to be
B. make it rule
C. used to be
D. have the habit of
答案：D