听力原文：Passengers, attention, please. This is the railway station broadcasting. The new

timetable of the railway will come into effect on May 18th, 2009. You can check and download the new timetable on the internet. And you can also ask the receptionists in our railway station. We here apologize the change of the timetable that made you inconvenient. Thanks for your attention.

What is the main idea of this announcement？

A．The railway station is apologizing to public.

B．The new railway timetable will come into effect.

C．How to check the new timetable on internet？

D．Where can one find the receptionist.