Christmas is a Christian holy day usually celebrated on December 25th ____ the birth of Jesus Christ.

They were arguing _____each other _____ the cause of SARS．

Learning to play basketball calls for perseverance, strength, time and skill. _____, it’s not a simple thing.

_____ production up by 60%, the company has had another excellent year.

We hadn’t planned to meet. We met _________ chance.

He has been absent ____ ____ class for quite a long time.

—Who is the man talking to Mr. Smith, the host of Shanghai TV?
— A local journalist ______ the earthquake and Tsunami which hit Japan on 11th March.

Facing the dangerous situation, he was completely______.

At the railway station, the mother waved goodbye to her daughter until the train was _______.

There are many ways in which you can improve your study. But __________, you should work hard.