问题描述：
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
After ten years,she changed a lot and looked different from _____ she used to be.
A.\x05that
B.\x05whom
C.\x05what
D.\x05who
问题解答：
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