___is known to us all is that the earth is smaller than the sun.w_英语解答

___is known to us all is that the earth is smaller than the sun.
why not use "what".why not use "it"

人气：475 ℃　时间：2019-11-06 09:26:34

解答

What注意：is that the earth is smaller than the sun这是系表结构,缺主语,所以用What如果用 it 那that the earth is smaller than the sun 就是真正主语,可是它前面有 is应该这样才对_It__is known to us all that...