问题描述： what that it 放在句首区别 同一个句话意思用三种表述举例子 1个回答 分类：英语 2014-11-13 问题解答： 我来补答 What is known to all is that the earth is round.That the earth is round is well-known.It's well-known that the earth is round 众所周知,地球是圆的. 展开全文阅读
