单项选择题
A. 6:55 a.m. B. 7:00 a.m. C. 7:05 a.m. D. 7:10 a.m.
A. In the school canteen. B. In all the hallways. C. Outside the office building. D. Outside the school library.
A．a speech B．a radio program C．a campaign plan D．a chemistry class