________I am trying to do is to persuade my elder brother to give up smoking.

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问题 ________I am trying to do is to persuade my elder brother to give up smoking.

选项 A、That
B、When
C、What
D、Which

答案C

解析 分析句子结构可知,is之前是一个主语从句。从句成分不完整,缺少do的宾语,所以应用连接代词what引导。that引导主语从句时,在从句中不充当任何语法成分,只起连接作用且无词义;when在主语从句中作时间状语;which在主语从句中作主语、宾语等成分,且有选择含义,这三项均不符合题意。故选C。
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本试题收录于: 英语题库普高专升本分类
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