1.___ is known to us all is that China is a developing count

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1.___ is known to us all is that China is a developing country.A.Which B.what C.as D.
1.___ is known to us all is that China is a developing country.A.Which B.what C.as D.It2.___ is known to us that China is a developing country.A.Which B.As C.What D.1B 2D.1是表从,为什么不能用It?2是主从,为什么不用what?

1题如果用it,得说.It is known to us all that China is a developing country.
2题用的就是我改写第一句的句型
看下面你就明白了：
What is known to us all(主语从句）is that China is a developing country
.It(形式主语）is known to us that China is a developing country（that引导主语从句）
再问： It，what都能引导名词性从句，怎么用？
再答： It 不可以，它不是连词。 what可以。见下例： What he has said(主语从句）sounds reasonable. This is what I bought yesterday(表语从句）。 Let me look at what you have pained(宾语从句）
再问： 1因为后面有一个谓语is了，如果填¡t代词作主语又有一个iS谓语，所以填引导词可以这样理解吗？
再答：你已经大致明白了。如果你用it 作形式主语的话，这就是主句中的谓语部分“is known to us all ”，后面的that China is a developing country就是真正主语了. 这样其前的is 就不知道是什么了哈哈。明白？

1.___ is known to us all is that China is a developing count （What) is known to us all is that China is a developing coun ____ is known to all,china is a developing country. ____is known to all ,China is a developing country _____Amer What is known to us all is that America is a developed count 名词性从句连接词的选择.___ is known to us all is that China is a develo 3.___ is known to us all is that America is a developed coun As is known to all, China is a developing country( )( )(属于）t As is known to all china is a developing country英文翻译中文 China is a developing country,---- is known to all as 和 whic As is known to all,China is a developing country.的意思? 英语英译中1.As is known to all,China is the largest developing co