单选题_____Abe doneBdoneCto doDto doing
单选题
_____
A
be done
B
done
C
to do
D
to doing
参考解析
解析：
used to do sth.表示过去常常做某事。be used to doing sth.习惯于做某事。其余均非正确搭配。
used to do sth.表示过去常常做某事。be used to doing sth.习惯于做某事。其余均非正确搭配。
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