单选
21.---Are you willing to change your MP4 for my Walkman?
--- !I’m not that stupid.
A.It just depends B.That’s OK C.No way D.Go ahead
22.Mary is clever, honest, and hard-working. ,she is a good student and we should learn from her.
A.In a nutshell B.After all C.By the way D.On the other hand
