这道题太难了以至于我解不开英语的4种说法

Question

这道题太难了以至于我解不开英语的4种说法

Answer 1

1.The problem is too difficult/hard for me to solve.
2.The problem is so difficult/hard that I can't solve it.
3.The problem is very difficult/hard so that I can't solve it.
4.The problem isn't easy enough for me to solve.
5.This is such a difficult/hard that I can't solve it.
6.This is so difficult/hard a problem that I can't solve it.
注：/ 表示可以任意选用其一；
还可以把solve改写成work out,solve it改写成work it out.