The United States _______one of the lowest smoking rates －25.5 percent of the population.

---- How is your hometown after the earthquake for 2 years. -----Thanks to the government, the reconstruction work of schools and farm houses ________ and people are living a happy life. 

Wang Pin is an advanced worker in our company. He _______ for four years in Yangzhou University.

It’s said that there are plenty of hotels in Shanghai. There _____ be any difficulty for you to find somewhere to stay.

--- Hi, Kate, can I use your bike for a while this afternoon?--- Sorry.??__________?. 

Scientists still wonder whether cloning will help or harm us and where it ____ us.

——Did you see Lucy last night ?She must have left home as she was wondering round the town at midnight .——The fact that she was wondering round the town at midnight         she had left home for good .

—Here’s the key to my car. —Thanks, but I must know where you ______ it.

When I said someone cheated in the English exam, I ______ you.

No one in the department but Tom and I        that the director is going to resign（辞职）. 

Our family       made up of six people, and all       music.

 Since she is out of work, Lucy________ going back to school, but she hasn’t decided yet.

If a computer crashes，you will lose the file you _____ on if you don’t save it early enough. 

The doctors have recommended that she _______ on, but she has not yet made up her mind.

 The car ran down the hill, and the driver _____, according to the newspaper, to have been killed. 

 Materials of this kind ____ once ____ on the wall.

At the end of the meeting, it was announced that an agreement ______. 

---Are you happy about your present job?--- Why shouldn’t I ? I _____ as much , and I enjoy more.

--Can I give you a call on Sunday?-- Sure, but I _______ to the mountains, so call me on my cell phone.

 —Why does the lake smell terrible?—Because large quantities of water           .