单项选择题
W: Welcome sir, go this way please. M: Thank you. W: Would you like to see a menu M: No, thanks. I already know what to order.
A.A doctor. B.A secretary. C.A waitress.
A.About 6:30 or 7:00. B.About 7:30. C.About 6:00.
A.They are cheaper than traditional newspapers. B.They are very convenient to use. C.You can get more information from them quickly. D.You can easily save information for future use.