单项选择题
A．She was ill at that time. B．She was busy with her work. C．She forgot about the meeting. D．She was preparing for a trip.
A．When to catch the train. B．Where to buy the ticket. C．How to reach the airport. D．Which bus stop to get off.
A．Don’t mention it. B．At about 2 o’clock. C．Thanks for your help. D．It’s 54576862.