Is sound very great.是哪里错?

Is sound very great.是哪里错? sound great=sound great吗? ________the idea________(sound)great. sound great的意思 His suggestions sound great! this is very great show 同义句 oh,dear,the dear deer is very dear!ha,great,the great grate is real great maybe the idea -------(sound) great that sounds great,和that sound great有什么区别let is play baseball__great A that is sounds. B that sounds C that is sound D that sound选什么？为什么？ -What he enjoys______(sound)great and interesting.-Yes.But it is dangerous Liu Xiang is a very great _______(run). The Great Wall （） China is very long i think china is a very great c___ The Great Wall is very wonderful.(改为感叹句) l am very p_____ with his answer,he is great Listen The music ( ) (sound) very beautiful.原因,理由为什么不用is sounding ---Let is play tennis.---that--------very good A.sounds B.sound C.has D.have his sound is fell very well 错在哪?怎么改