to understand the problem is very difficult .(改同义句)
to understand the problem is very difficult .(改同义句)
to understand the problem is very difficult.(用it作为形式主语)—— ——
The problem is very difficult to ( )
to answer the question is very difficult改为同义句
The problem is difficult,I can't work it out.(改同义句) The prob
it was very difficult for him to work out the problem改为同义句
it was very difficult for him to work out the problem 改为同义句
This book is difficult to understand.改为同义句
一句英语同义句,the mats problem is so difficult that i failed to wo
The math problem is too difficult for him to work out.(写出同义句
IT IS DIFFICULT FOR THEM TO DEAL WITH THE PROBLEM.同义句
the problem is too difficult for me to work out 英语改为同义句