( ) More and more young people are trying to do something _____ the old .
( ) More and more young people are trying to do something _____ the old .
A.served B.to serve C.serve D.serves 讲解原因
A.served B.to serve C.serve D.serves 讲解原因
英语人气：510 ℃时间：2019-08-18 11:25:15
优质解答
B.to serve 动词不定式表示目的,做某事的目的是服务老人.
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