单项选择题
We very much appreciate your efforts（）.
A. our production costs must be no more than 15 percent B. has done damage to our reputation C. to negotiate with you D. to make this product possible
单项选择题 We’ll do our（）to make your visit worthwhile.
单项选择题 Shall we get straight（）to business?
单项选择题 The engineer recommended（）
单项选择题 Can I （）a message or would you like to ring him on his mobile phone?
