He is so w____ that he can work out this difficult problem e

He is so w____ that he can work out this difficult problem e This problem is so difficult that nobody can work it out. This problem is so difficult that we can't work it out.(保持句意 This problem is so difficult that nobody can work it out.(保持 So clever is he that he can work out all the difficult probl the math problem is so difficult that he can'twork it out (改 Waht a b____ boy he is!He can work out the difficult problem This is so difficult a problem as no one can work out.as能不能换 1.The math problem is so difficult that I can't work it out. The problem is so difficult that nobody can work it out(改为同义 The problem is so difficult that I can't work it out.同义句 ____,he can not work out the difficult problem