题目内容
19.When I try to understand _____ that prevents so many Americans from being as happy as one might expect,it seems to me that there are two causes.( )| A. | why it does | B. | what it does | C. | what it is | D. | why it is |
分析 当我努力想弄明白究竟是什么让许多美国人没有人们预料的那么幸福时,在我看来有两个原因.
解答 答案:C
题干中that prevents so many Americans from being as happy as one might expect是作动词understand的宾语,是一个宾语从句;从句中prevents缺少主语,要用连接代词;句意表达的是事情,要用what来连接;句中it is…that构成强调句型,对从句的主语what进行强调.故选C.
点评 在句子中起名词作用的各种从句统称为名词性从句.根据它们在句中的语法作用,这类从句又可分为主语从句、同位语从句、表语从句和宾语从句. 本题中what在宾语语从句中起连接作用,同时又充当了从句的主语.比较容易混淆的是宾语从句中加入了强调句型,让句子结构很复杂.解题时,要注意强调句型的特点,那就是不影响句子结构.
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