The problem is very hard,I don't know how to work out._____ (改错,写错的单词）

To work out the problem is very hard .(同一句) _____ is very _____ _____ work out the problem . to understand the problem is very difficult .（改同义句）（　）（　）very　difficult　（　）understand　the　problem what is the problem .用括号内动词的适当形式填空1.The problem _____(discuss) yesterday was very important.2.The problem _____(discuss) now is very important.3.The problem _____(discuss) tomorrow is very important. 英语翻译it is a very complicated problem which isn't the side the speaker conveyed. He is the ____(last) one to work out the problem.He's very happy. the boy is very clever.he can work out the math problem in a ( )way the problem is very difficult ,You can't work it out------ ----------上填什么? he is very clever .he can work out the problem . 合为一句话? The problem is very difficult.He can't work it out.(合并为一句） The boy is very clever .He can work out such a maths problem without d＿. I have no appointment the problem is very urgent 用中文翻译 The problem is very hard.Why don't you --------(ask) your teacher英语题 To work out the problem is very hard 的同义句答案 快 回答 the-----is very difficult,I can not work it out用question 还是problem The Maths problem is very e______ .I can work it out mysulf.快 the problem is that she's very shy.这是从句吗?什么从句? i think the problem is very easy.think后是什么成分