Beijing is a nice city because more and more trees _______ every spring.

Don’t give up halfway, Andy. You’ll succeed _______ if you keep on working like this.

________is known to us all is that the 2012Olympic Games will take place in London.

? Can you _________ all the money that I should pay? ? Very sorry. Please wait a minute, madam.

— Hi, Susan, can your parents attend the parents’ meeting this afternoon — Sorry, they ________ to Hong Kong on business.