We found________ the problem.A it is difficult to solve B it

We found________ the problem.A it is difficult to solve B it It is easy __ the problem.A,for him solve B,for him to solve The problem is too difficult for us to solve it. 这个句子里面的it 为 It s______ that the problem is difficult to solve.空里填什么? 1.It is easy ( ) the problem.A.for him solve B.for him to so It is more difficult to solve a problem than that of finding Is it a problem difficult to solve?求解释,给分啊 This is a s_____ problem.We must solve it can,we,learn,solve,a,to,forget,problem,by,it if we do have the problem,it's a tough one to solve in a goo It is _______to teach a kid the way to solve a problem than I find it difficult to solve this problem .(改为复合句)