“OK”手势在美国等西方国家表示( )。

A．“允诺”

B．“同意”

C．“诅咒”

D．“金钱”

E．“搞定”

— I wonder if I _____ smoke here.   

—  No, you _____. You see, there is a "No Smoking" sign on the wall.   [ ]

A. may; needn't    

B. must; can't      

C. shall; won't      

D. can; mustn't