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________ to sunlight for too much time will do harm to one's skin.
A.ExposedB.Having exposed
C.Being exposedD.After being exposed
C

试题分析:从句子成分分析,全句中有will do作为谓语动词,故expose应作为非谓语动词作主语的形式,并且根据句意应表被动,排除B。而D中有after可作连词,从句必须主语谓语,故排除。又因过去分词不能单独构成主语成分,需用being done的形式,故选C。句意:暴露在阳光下太长时间会对一个人的皮肤有危害。
点评:本题重在理解非谓语动词的用法,非谓语动词是高考语法点的重中之重。把握好以下的知识:to do 表目的、将来;doing 表主动、伴随;done表被动、完成。同时答题步骤为:1.判断是否为非谓语动词,看是否有连词。2.找逻辑主语。3.判断逻辑主语与非谓语动词的关系。4.看是否非谓语动词动作发生在主句谓语动作之前,如果是之前,就用完成式的形式。
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