Those math problems were so difficult that___students worked

Those math problems were so difficult that___students worked Peter found ______ difficult to work out math problems. Those three problems are all__,but this one is__.(difficult) 1.At last we worked out these math problems.（改为同一句,每空一词） he worked hard,so he worked out of the difficlt problems.同义句 those young men were so excited___seeing th 下列so的用法是错误的:so a diffcult problem,so difficult problems,so h This math problem is so difficult that only ( ) students can This math problem is so difficult that only ________ student they are some difficult math problems.改为单数句 ____ ____ diffic Look!LiPing is __ __(解决)those math problems怎么做啊 改错Those have difficult in working out the maths problems can