is this what you intended to accomplish with your career?求分析这个句子.为什么要用what 不用that

goodbye,This is what you This is what you are meant for. Do you know what this is? What do you mean is this chinese? Is This What You Call Love?歌词 This is what you choose in Can you still remember what is this?还是Can you still remember what this is? Can You Tell Me What This Is 歌词 you,know,what,is,this,do,country连词成句 连词成句：you,know,what,is ,this,do ,country(?) This is WHAT I want to tell you.对不? you,know,what,is,this,do,country连词成句 Do you know what this is?什么句子成分 用 you this do what is know 组成一句话 用you,this,do,what,is,know..组成一个句子 This is what you call a life是什么意思 This is what you said changes求中文 This is my eating habits.What about _____(you)?