that maths problem is 空格difficult 空格nobody can do it .a:very

that maths problem is 空格difficult 空格nobody can do it .a:very The problem is so difficult that nobody can work it out(改为同义 同义句 The math problem is so difficult that nobody can work it This problem is so difficult that nobody can work it out. This problem is so difficult that nobody can work it out.(保持 the maths problem was so difficult that nobody could work it It is difficult () out this maths problem The question is so difficult that nobody can answer it This maths problem is and I can do it .A easy；easily B easil 初中英语34.---the maths problem is very difficult.Can you ___?-- the maths problem isn't very easy and it is difficult The maths problem is very difficult,.I work it out,though 为什