题目内容
Some researchers believe that there is no doubt ______ a cure for AIDS will be found.
A.which | B.that | C.what | D.whether |
B
解析试题分析:句意:一些研究人员相信艾滋病的治愈方法将会被发现是毫无疑问的。there is no doubt that毫无疑问的是,that引导的是同位语从句,在句中不作成分。不可以省略,故选B
考点:名词性从句
点评:名词性从句分为主语、宾语、表语、同位语从句四种,同位语从句和定语从句的区别在于:that作为关系代词,可以引导定语从句,充当句子成分,在从句中作宾语时可以省略; that引导同位语从句时,起连词的作用,没有实际意义,不充当句子成分,一般不能省略。
试比较下面两个例句:
I had no idea that you were here.(that引导同位语从句,不能省略)
Have you got the idea(that)this book gives you of life in ancient Greece?(that引导定语从句,作宾语,可以省略)
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