the-----is very difficult,I can not work it out用question 还是p

the-----is very difficult,I can not work it out用question 还是p The question is very difficult.No on can work it out.句意不变 首字母填空 The question is not very difficult. You can work it ou the problem is very difficult.we can't work it out.(合并）the p this question is very ( )i can work it out（ ） The problen is difficult.I can't work it out. The math problem is not very difficule.I can work it out e__ The problem is very difficult.We can't work it out.The probl 改错This math problem is very difficult but I can work out it. 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.(51.合并）