问题描述：
Is this （ ）ball?No,（）is over there. A.yours；my
Is this （ ）ball?No,（）is over there. A.yours；my B.yours；mine C.your；mine 选择正确选项,并说明理由.
Is this （ ）ball?No,（）is over there. A.yours；my B.yours；mine C.your；mine 选择正确选项,并说明理由.
问题解答：
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