exercise can be difficult ,bu it is fun

exercise can be difficult ,bu it is fun This exercise is so difficult that few of us can do it.为什么后面 如下：The exercise is very difficult.We can't work it out.(合并为一 -You can't imagine___great fun chatting online is.-Really?Bu 英语翻译1.This math exercise is a most difficult exercise,but it Exercise can be fun ,and they can help you stay healthy.,译全句 difficult it may be, we can finish it in time. This exercise is difficult A so ,that few of us can do Btoo, 英语翻译1.It can be especially /specially difficult for drivers Cycling is good exercise.It can make us s 为什么The exercise is too difficult for anyone of us to do it?错 This exercise is too difficult for anyone of us to do it有何错?