The problem is so hard that I can't work it out .如果去掉"it"就不能

The problem is so hard that I can't work it out .如果去掉"it"就不能 1.The math problem is so difficult that I can't work it out. The problem is so difficult that I can't work it out.同义句 The problem is so hard that no one can work out .请问如果后面it也对吗 The math problem is so hard that we ean't work it out. The m The problem is so hard that almost nobody can work it out为什么 The physics problem is so easy that I can work it out.(同义句两种 the problem is so hard that （ ） of the student can work it o This problem is so difficult that we can't work it out.(保持句意 The math problem is so hard that only ( ) of us can work it The problem is not hard.I can work it out ______ (easy). 改为同义句I find that it is hard for him to work out the problem.