单项选择题
Could you come（）to the development workshop for a second?
A.up B.on C.down D.over
单项选择题 I have the authority（）.
单项选择题 Because we can’t find a compromise（）
单项选择题 We very much appreciate your efforts（）.
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?
