1. B. WhatWhat...us + is + that...What...us 是名词性从句,做主语;is...是复合句的谓语动词,that-是表语从句。2. D What,道理和1一样。如果用it作‘形式主语’就要用that-引导“主语从句",并移到句子后面,保持句子平衡:Itis well known to us that- = That- is well known to us.= As is well known to us, many earth's...out. (Not: Which is well known to us,...)= As is well known to us, gett...
这是考试易错点:做题的关键就是确定选的那个词是不是从句的引导词。1. ____ is well known to us is that ...这个部分就出现了两个is了,根据分析前一个is是从句的谓语动词,后面的is是整个句子中的谓语动词,后面的that只是一个表语从句的引导词。所以这个选择的是从句的引导词,就是as。其实,这道题最应该纠结的是C和D...
首先,从句子成分上分析,这两个句子大致是一样的,所以这两个空的选择应该是一样的。其次,如果选用it,it is……that构成强调结构,但中间多出了一个is,所以不对;如果选as,应该是as (well) known to us all或者as it is (well) known to us all,也不对。我选择的是what,what引导的是主语从句作句...