This is _____difficult problem______my brother can't work it

This is _____difficult problem______my brother can't work it This Maths problem is difficult.I can't work it out.的同义句 This problem is too difficult.I can't work it out,and() This math problem is _____ that one.I can't work it out 高中英语题i can't work out this problem .it is a most difficult o i think this work is so tired that i can’t stand it.这句话对吗 This problem is so difficult that we can't work it out.(保持句意 This problem is so easy that you can work it without______(t This problem is too difficult.I can't work it out,and(). This maths problem is not easy.I can't work it out. 同义句转换1.I don`t think my brother can work out this problem al This is ( ) hard work that nobody can do it well