We can make a fire ______ the room warm so that we can chat for a while.

When we see a cigarette box, we’ll see “ Smoking is harmful to your health” on it. Children are not    36  to smoke by their parents or teachers. But in many countries  37 is becoming a bigger problem for young people. Most smokers   38  in their teens or earlier.

Some students think smoking is very cool, and they can see many people smoking around them. They want to have a   39 .

“If young people start smoking early, they will probably get addicted （上瘾的）to nicotine（尼古丁）. And it will be very hard to  40   later on,” said a professor. A study shows smoking is a problem for many Chinese teens.  41    can we do to make them stop smoking?

Some people think we can make a law. Teenagers under 18 are not allowed to smoke,   42   they should be fined. Parents should give up smoking. They can set an example （树立榜样）43   their children.

“Every year about four million people die of smoking. And if people  44   smoking, the number will increase （增加）10 million a year from now on,” said the World Health Organization. So we must learn and tell others about the  45  of smoking.

阅读短文, 用完整的句子回答问题.
The first Earth Day was in 1970.People were beginning to worry about what we were doing to our environment. So they set up Earth Day to tell everyone about their worries. In 2007 organizers in over 150 countries planned over 4,000 big events. But Earth Day is not just about marches(游行) and big events. In the week around Earth Day (22 April) there were many thousands of smaller, local events. These events dealt with environmental problems in the neighborhood. The world Wide Fund for Nature made a list of 5 things that each person could do to save the environment.
Don’t leave the tap running.
Turn off lights when you leave a room.
Turn off your computer every night.
Wash your clothes, and yourself, in warm or cold water, not hot water.
Dishwashers use as little water as possible.
If we all do at least 2 of these all the time, we can make a big difference.
【小题1】Was the first Earth Day set up in 1970 ?                       
【小题2】When is Earth Day?                             
【小题3】How many countries planned big events in 2007 ?                     
【小题4】What should people do when the water keeps running from a tap?      
【小题5】What else can you do to save our environment ?                       

We can make a fire（火） ______ the room warm.

A. to keep??? B. keeping?? C. keep??? D. kept