题目内容
Lucky is a ______ dog. It can help disabled people to do lots of things after 2 years’_______.
A. train; trained B. trained; training
C. train; training D. trained;train
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题目内容
Lucky is a ______ dog. It can help disabled people to do lots of things after 2 years’_______.
A. train; trained B. trained; training
C. train; training D. trained;train