[单项选择]A. Because many young people have moved into comfortable apartments.
B. Because many old houses in the bad part of the town are not inhabited.
C. Because many older people sell their houses after their children leave.
D. Because many people have quit their old houses to build new ones.

[填空题]Because people have been paying too much attention to the sulphur particles and other pollutants, they overlooked another problem, global warming.

[填空题]Many young Americans who have traveled abroad dislike traditional food more and more, so they only try exotic food.

[单项选择]Because fuel supplies are finite and many people are wasteful, we will have to install_______ solar heating device in our home.
A. some type of
B. some types of a
C. some type of a
D. some types of

[填空题]People choose to procrastinate because they have to deal with different kinds of complex work.

[填空题]Enormous loss of life occurred because many people were locked below and there weren’t enough ______.

[填空题]Because many people will come to the meeting, we need some (addition)______ chairs.

[填空题]Many people with middle income have moved from New York City to the suburbs in the past 10 years.

[单项选择]Why are mobiles so popular Because people love to talk to each other. And it is easier with a mobile phone. In countries like Russia and China, people use mobile phones in places where there is no ordinary telephone. Business people use mobiles when they’’re traveling. In some countries, like Japan, many people use their mobile phones to send e-mail messages and access the Internet. They use a new kind of mobile phone called "i-mode". You can even use a mobile phone to listen to music. Mobile phones are very fashionable with teenagers. Parents buy mobile phones for their children. They can call home if they are in trouble and need help. So they feel safer. But teenagers mostly use them to keep in touch with their friends or play simple computer games. It’’s cool to be the owner of a small expensive mobile. Research shows that teenage owners of mobile phones smoke less. Parents and schools are happy that teenagers are safer and smoke less. But many people dislike them. They ha
A. Because people hate the businessmen using mobiles in public places.
B. Because the use of mobile phones can be physically harmful.
C. Because there is strong evidence for the problems of mobiles.
D. Because people feel their privacy unprotected in a cafe or restaurant.