A. afterB. whenC. ifD. unlessNo credit will be offered（……

单项选择题A:Good weekend? B:（）

A. Yes.
B. Thank you. 
C. No， thank you.
D. Excellent, thank you.

单项选择题Mr. McNeil asked Mr. Don Bradley to ship the goods（）air.

A.by
B.on
C.at
D.in

单项选择题（）the Manager’s not available at the moment. But the Assistant Manager is here.How Can I help you, madam?

A. I’m afraid
B. With our compliments
C. To talk to the Manager
D. It is entirely our fault

单项选择题A:Welcome to Bibury Systems. B:（）

A. Thank you.
B. That’s Research and Development. 
C. No， thank you. 
D. Yes.

单项选择题（）,three months ago I could not have negotiated this deal.

A. Especially
B. Partially
C. Entirely
D. Obviously