—I want to know if I__________ smoke here.

—No, you _________.Could you see the sign “NO SMOKING” there?

A．can; needn’t

B．must; can’t

C．shall; won’t

D．may; mustn’t

An exporter sells goods to a customer abroad on FOB and on CFR terms by L/C. Who is responsible for the freight charges in each（）

A．Beneficiary; applicant 　

B．Seller; buyer

C．Buyer; seller

D．Exporter; exporter