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英语分析[ ] the compass was first invented in china .选项 A It is

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英语分析
[ ] the compass was first invented in china .
选项 A It is known to all.
B It is known that.
C We all known.
D As is known to all.
求此句的分析.正确答案是哪个?为什么要选那个?别的选项为什么不可以?还有句子的翻译?
B.
It is known that the compass was first invented in China.
这里是一个主语从句,it做形式上的主语,真正的主语是that the compass was first invented in China这个从句.由于这是一个主语从句,所以that不能省略.
A选项缺少that C选项 语态以及引导词不符 D选项如果改为AS KNOWN TO ALL THAT 才对