To be a doctor is I wanted to be中填all that还是all what,

问题描述:

To be a doctor is I wanted to be中填all that还是all what,

all that=what ,所以填all that

All that 正解
如果用what前面不用加all
To be a doctor is what I wanted to be. 自成一句

all what

应该填all that 因为all that =what

To be a doctor is 【all (表语)】that I wanted to be(定语从句,that 作宾语,可省略.)
=To be a doctor is【 what 】I wanted to be.what 从句作表语,即表语从句.
这两句意思完全一样,只是作表语的语言材料不同而已

不缺成份用that