单项选择题

Prices may change quickly if supply or demand（）.

A. changes
B. change
C. will change

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单项选择题

A:Hi Bob, Id like to congratulate you on the progress of Beihai project. B:（）

A. Fine,thank you. It is really an interesting project
B. Thank you,John. It is really an interesting project
C. My pleasure,It is really an interesting project

单项选择题

A:Oh. But why didnt he just own up and tell someone? B:（）

A. So be careful with our job
B. He was too scared that he would be fired, I suppose
C. You should have told him that earlier