It is so difficult that we can't climb up the mountain.什么意思?

It is so difficult that we can't climb up the mountain.什么意思? The mountain is so high that he can't climb it(同义句) the question is so difficult that we can't answer it.(同义句) 英语改句子The math problem is so difficult that we can't work it It is ____ difficult for us ____ climb up the mountain . A. the hill was so high that we couldn't climb it(保持原本意思不变) the It is not difficult for me to climb the mountain. Climb up the mountain意思 This problem is so difficult that we can't work it out.(保持句意 The work is so difficult that we can not finish it in time() the problem is so difficult（ ） we can't work it out 1.The math problem is so difficult that I can't work it out.