题目内容
We ________ in this school for about two years．
[ ]
A．
study
B．
studied
C．
have studied
答案：C
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We _____ in this pool when we were young, but now it _____ fish.
| A．are used to swim; used to keep |
| B．are used to swimming; used to keep |
| C．used to swimming; is used to keep |
| D．used to swim; is used for keeping |