He didn't play the piano ------his sister.

问题描述:

He didn't play the piano ------his sister.
A.as beautiful as
B.so beautiful as
C.so beautifully as
D.as more beautiful as
AB哪错了

C.so beautifully as
so...as和as...as都可以用在这里,表示与谁一样
但是beautiful在这里市修饰play的,应该用副词形式~所以选择C~