this（ ）is very difficult.I can't work it out.

改错This math problem is very difficult but I can work out it. this question is very ( )i can work it out（ ） This Maths problem is difficult.I can't work it out.的同义句 This problem is too difficult.I can't work it out,and() 高中英语题i can't work out this problem .it is a most difficult o This problem is too difficult.I can't work it out,and(). The problen is difficult.I can't work it out. The problem is very difficult.He can't work it out.(合并为一句） the problem is very difficult.we can't work it out.(合并一个句）th the problem is very difficult.we can't work it out.(合并）the p The problem is very difficult.We can't work it out.(51.合并） The problem is difficult.I can't work it out.（连成一句）