题目内容
【题目】Mr.Black often ________in the park. ( )
A.do exerciseB.doing exerciseC.does exercise
【答案】C
【解析】
略
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题目内容
【题目】Mr.Black often ________in the park. ( )
A.do exerciseB.doing exerciseC.does exercise
【答案】C
【解析】
略