为什么要用what?After ten years,she changed a lot and looked different from _____ she used to be.A.\x05that B.\x05whom C.\x05what D.\x05who

为什么要用what?After ten years,she changed a lot and looked different from _____ she used to be.A.\x05that B.\x05whom C.\x05what D.\x05who
为什么要用what?
After ten years,she changed a lot and looked different from _____ she used to be.
A.\x05that
B.\x05whom
C.\x05what
D.\x05who

为什么要用what?After ten years,she changed a lot and looked different from _____ she used to be.A.\x05that B.\x05whom C.\x05what D.\x05who
首先排除A that,that 不用在介词from后面.
从句话意思上来说,十年后,她改变了许多,看起来与她的过去有很大的差别.
she used to be ...她过去是怎么样,而不能表示过去她是谁
所以whom与who也不对
只能是what