tonics are probably not harmful...

题目

tonics are probably not harmful...
____the tonics are probably not harmful---_____your wallet,Heller thinks that people who try them may not realize how highly caffeinated they are.
A While ,except for B As ,except for C While,except to
D As,except to

答案

while 表转折,虽然
后面的except to 其实是be harmful to ,意思是说出来对你的＾有害（花钱）