题目内容
4.What I want to know is the price of oil is still rising.( )A. | when | B. | how | C. | why | D. | that |
分析 我们想知道的事情是为什么油价仍然在上涨.
解答 答案:C 题干中the price of oil is still rising是作is的表语,是一个表语从句;句意表达的是我们想知道的事情,表达不确定的内容;when表示时间,how表示方式,why表示原因;表语从句中is still rising表示仍然中上涨,应该是原因.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why在表语从句中起连接作用,同时又充当了从句的原因状语.

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