单选题
I am accustomed______late on weekends for I have the habit of working at night.
A、
to sit up
B、
to sitting up
C、
at sitting up
D、
for sitting up
【正确答案】
B
【答案解析】
解析：be accustomed to sth．或be accustomed to doing sth．，习惯于…，固定词组。
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