Question

________ is known to us all is that Antarctica is the coldest place on Earth.

A．It

B．As

C．What

D．That

Answer 1

C

 
试题分析：句意:大家都知道南极洲是地球上最冷的地方。这里what引导的主语从句，它在从句中做主语，that在主语从句中不作成分，it不能起引导的作用，as“正如”，根据句意故选C。
点评：本题难度适中。判断从句中用哪个连词，需用记住连词的用法，在句中的作用，连词也是高考的热点，需要考生平时多练习。需要考生会分析句子成分理解句意。
即学即练: We students got lost in the forest and decided to remain________we were and waited for the guide.
A.where       B.what       C.how        D.who
解析：A。where引导表语从句，并在从句中作地点状语。