It is uncertain ______ the experiment is worth doing .A.whereB.thatC.whetherD.ho
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It is uncertain ______ the experiment is worth doing .A.where | B.that | C.whether | D.how |
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答案
C |
解析
试题分析:考查主语从句。本题中的it是形式主语,真正的主语从句是后面的whether the experiment is worth doing,因为前面是形容词uncertain,说明指的是不确定的事实,故使用whether,where和how的语义与句子不符。句意:这个实验是否值得做还不确定。故C正确。 点评:名词性从句的考查集中在引导词的选择上,连接词that, whether, if在句中不充当任何成分,只起连接作用;连接代词who(ever), which(ever), whom(ever),whose(ever),what(ever)在句中做主语,宾语,表语和定语;连接副词when, why, where, how,在句中做状语。应从上下句的句法关系着手分析,切不可‘望句形生答案’总的来说,考生在解答此类型时,可用排除法或造句法,造句法就是仿造原句的语法功能仿造出一个易懂易理解的句子,帮助判断。 |
举一反三
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