一道表语从句,麻烦分析一下

一道表语从句,麻烦分析一下

题目
一道表语从句,麻烦分析一下
One of the most important questions they had to consider was __of public health
A what B one C that D which
答案
答:选C
解析:本题考查代词的用法.四个选项中,只有that可以代替句单数可数名词或不可数名词,以避免重复.如:The output of steel this year has increased by 20% compared with that in 1992.
今年钢产量比一九九二年增长了百分之二十.(此句中,后面的that指代前面的output这个不可数名词).又如:The book on the desk is not so interesting as that in the desk.(此处的that指代前面的book这个单数可数名词,相当于the one).本题句意:他们必须考虑的最重要的问题之一就是公共卫生问题.如果还原这个句子,即:One of the most important questions they had to consider was the question of public health.(此处的the question是单数可数名词,因此可以用that或the one替代),故选C.
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