单项选择题
What's the（）difference between the two parties?
A.essential B.great C.necessary D.dominant
单项选择题 --Excuse me, how far is the airport from here? --（）
单项选择题 --I'm glad you like it. Please drop in any time you like. --（）
单项选择题 --You've given us a wonderful Chinese dinner, Mrs. Wang. --（）
