Question

The problem is too difficult for us to work out.(改

The problem is too difficult for us to work out.(改为同义句)
The problem is () difficult that () can work it out.

Answer 1

The problem is 【so 】difficult that 【none of us 】 can work it out.

too...for sb. to do 太...以至于不能...
= so.... that sb. can't do sth. 如此...以至于某人不能...

The problem is () difficult that () can work it out. 此句中由于 can 是肯定式, 因此只能用主语来表示否定.

故用【none of us 】. 如果只能填一个词的话, 就填【nobody】 即:

The problem is 【so 】difficult that 【nobody】 can work it out.

追问

我也是这样想的，填nobody，

追答

你的想法是对的. 如果只能填一个词的话, 就填【nobody】.

第二个空有没有词数限定嘛? 如果没有,就用【none of us 】更准确一点.

Answer 2

您好，改为
The problem is (so) difficult that (we) can't work it out.

追问

是can哦，不能改成can't的说

追答

哦，那楼上那位说的对。。。。

Answer 3

so;no one

追问

后面只有一个空哦

追答

(⊙o⊙)…对，只能是nobody叻。。。。。。