【英语】选用As 与 it 的一道选择题

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/13 07:46:35

【英语】选用As 与 it 的一道选择题
1.___is well known to us is that many earth's resources are running out.
A.It B.What C.As D.Which
2..___is well known to us is that getting up early is good for health.
A.As B.It C.Which D. What
两道题应分别选什么?我就是在纠结到底是选As 还是 It 我觉得因为两句都有that 应该就用It 这两句话也就是不是定语从句了.不知道我的答案对不对.希望各位帮我解答一下

1.B.What
What...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：
It is 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,getting up...health.
还可以说：
Many earth's...out,as/ which is well known to us.(Both as- and which- is OKay here.)
Getting up...health,as/ which is well known to us.
只要句子结构正确,或使用得当,都可以,表达相同的意思.

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