A smile costs ______, but gives much.
Beijing is one of the ______ in the world today.
Lily will give a talk tomorrow. She is thinking about ________ to make everyone happy with her speech.
----Excuse me, could you please tell me _______ ?----Sorry. But the bus stop is over there. You can go and check the bus lines.
As time goes by, the number of foreign students in our school_____________ growing fast. A small number of the exchange students __________from Korea.
--Could you tell me what time the train leaves Hefei for Beijing?--I’m afraid you need to ____on the Internet.