题目内容
-Do you often go to the library?
- I ________ it, but I have no time now.
A. use to do B. used to doing C. am used to do D. used to do
D

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题目内容
-Do you often go to the library?
- I ________ it, but I have no time now.
A. use to do B. used to doing C. am used to do D. used to do
D