It's difficult to e____ the problem to the beginners.The vis

It's difficult to e____ the problem to the beginners.The vis He found it difficult to work out the problem. It’s difficult for me to work out the math problem(同义句改写） it's not difficult 【 】us to work qut the math problem [ ] th It's clever for him to work out the difficult math problem.单 The problem is very difficult to ( ) I found it difficult to work out the problem.中it可以换成it's吗?为什 It's difficult to work out the math problem.(写出同义句) －－－－ the it is difficult to work out the problem 对work out the proble So difficult it to work out the problem that i dicided to as So difficult __ it to work out the problem that I decided to We found________ the problem.A it is difficult to solve B it