单项选择题
A．Pretty well, thanks. B．Yes, thanks. C．Nice to meet you. D．How do you do.
A．You have to buy it. B．This afternoon, I think. C．On the third floor of the library. D．It’s 10: 30.
A．He had two classes yesterday. B．He will have classes all morning. C．His class begins at 9:00 o’clock. D．His class lasts two hours.