[填空题]Smoking is so harmful to personal health that it kills ______(多七倍)people each year than automobile accidents.

[单项选择]Smoking is so harmful to personal health that it kills people each year （）than automobile accidents.
A. seven more times
B. seven times more
C. over seven times
D. seven times

[填空题]Smoking is so harmful to personal health that it ______ (每年吸烟致死的人数是车祸致死人数的八倍).

[填空题]Sulfur dioxide is not so harmful to human health as to plants.

[单项选择]

[听力原文]
Smoking can be harmful to your health. But why do people smoke
One reason is that people become addicted to cigarettes. To be addicted means that your body comes to need them. The addictive substance in cigarettes is nicotine. When people smoke, the nicotine goes right into the blood stream and makes people feel relaxed. A smoker’s body gets accustomed to the nicotine and if he stops smoking he feels nervous. Many smokers try to stop smoking, but because of the addiction to nicotine they feel so uncomfortable that they often find it too difficult to stop.
Another reason is that people simply enjoy smoking and what it symbolizes. Having a cigarette for many people means taking a break. For some people smoking becomes part of certain social rituals, for example, the cigarette after dinner. Many people enjoy smoking because it gives them something to do with their hands. Reaching for a cigarette, lighting it and flicking the ashes are especially
A. Nicotine.
B. Ashes.
C. Smoke.
D. Tar.

[单项选择]A. Because smoking is harmful to the man’s health.
B. Because smoking is harmful to children’s health.
C. Because the man has set a bad example for the children.
D. Because the man should find other pleasures in his life.

[填空题]We must keep ourselves（）(health) so that we can study well.

[填空题]Smoking is (harm) （） to your health, so you had better give it up.

[填空题]We must keep ourselves ______ (health) so that we can study well.

[填空题]Smoking is (harm) ______ to your health, so you had better give it up.

[填空题]Television is harmful to American polities because it makes the issues and electorate ______.

[填空题]Diminishing natural resources will prove harmful to the well-being of humanity.