问题补充：
– Can your sister play tennis?
-- Sure. She plays I do.
A. as good as
B. so good as
C. so well as
D. as well as
答案：
A. as good as
B. so good as
C. so well as
(答案→)D. as well as
解析：as good as和……一样好，用于肯定句；so good as如……一样好，用于否定句；so well as 如……一样好：as well as和……一样，不但……而且。句意：你妹妹也能打网球吗？——当然了。不但她会，我也会。结合语境可知选D。
