问题补充：
She speaks English an American, so we all believe that she has stayed in America for many years．
A. as good as
B. as bad as
C. as badly as
D. as well as
答案：
A. as good as
B. as bad as
C. as badly as
(答案→)D. as well as
解析：本题的含义是她的英语和美国人说的一样好。as……as……表示……和……一样意思，根据语境可知此句表示一样好，在英语比较级中表示与…一样可用as……as，且用来修饰动词speak，故用副词well故本题选D。
