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 |
相关试题
Mom, this is my teacher, Miss Lin. Miss Lin, ____
| A．thank you. | B．how are you? |
| C．this is my mom. | D．hi. |
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