I know she didn't pass the qualifying exam, but really she is (

I know she didn't pass the qualifying exam, but really she is ( ) but stupid.
A、anything
B、nothing
C、something
D、none
【正确答案】：A
【题目解析】：nothing but 只是，仅仅，anything but 决不，根本不，句子含义为她没有通过资格考试，但是她根本不笨。