单项选择题
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.
A．It is not good at all. B．No, I borrowed it. C．The history book is very interesting. D．Yes, l will.