t is difficult for us to learn a lesson in life ____we have actually had that lesson.答案给的untill,可以用unless吗?我觉得unless更好.如果用until怎么翻译?

写出同义句 the problem is too difficult for ue to solve.the problem is difficult we can,t solve it.the problem easy for us to solve. Chinese is _____(difficult) for Dave to learn.He can't understand it. Right.This is difficult for you.Why don’t you read ____easier. The problem is so difficult that I can't work it out.同义句The problem is _______ _______ difficult for me ______ work out. The math problem is too difficult for him to work out.(写出同义句）The math problem is _____ difficult _____ he can't work it out. It is too difficult for you to answer.Why ____the teacher for help? A.don't ask B.not ask The question is too difficult for me to answer.同句The questionisn‘t（）（）for me to answer it is very difficult for me. english is (real) difficult for me it is difficult a book for us I thing nothing is difficult for 急 I thing nothing is difficult for it is difficult for me.为什么要用for?是it is too difficult for me. The question _ too _ for me _. A. isn't;difficult;to answer it B.is;difficult;to answer it 把英语翻译汉语It is the most difficult thing for me that I can't forget the hurt from you! 英语翻译：Bill has almost everything.It is difficult for him to think of something he doesn't have. T____ it is very difficult for me to learn maths well,I won't give it up. We don't play soccer because it is difficult.【写出同义句】格式：Soccer is not easy for us_____we don't play it.