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thechildrenarehavingagoodtime,__________withsand,otherswithtoys.a.someofthemplayingb.whoplayingc.someofehomareplayingd.someofthem
题目内容：
the children are having a good time,__________with sand,others with toys.a.some of them playing
b.who playing c.some of ehom are playing d.some of them优质解答
c.some of them are playing
b.who playing c.some of ehom are playing d.some of them
优质解答
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