问题
选择题
30．--- Do the Smiths live next door to you?
--- No, but they____.
A．used to
B．used to do
C．used to doing
D．used to be
答案
答案：A
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30．--- Do the Smiths live next door to you?
--- No, but they____.
A．used to
B．used to do
C．used to doing
D．used to be
答案：A