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.
单项选择题 Is it possible（）
单项选择题 A: Would you like a cup of coffee? B:（）
单项选择题 The new executive has done well to make the wholesaler agree（）
单项选择题 A provisional agreement is one（）
