填空题
The Dangers of Secondhand
Smoke
Most people know that cigarette smoking is
harmful to their health. Scientific research shows that it causes many kinds of
diseases. In fact, many people who smoke get lung cancer However, Edward Gilson
has lung cancer, and he has never smoked cigarettes. He lives with his wife,
Evelyn, who has smoked about a pack of cigarettes a day throughout their
marriage. {{U}} {{U}} 1 {{/U}} {{/U}}
No one
knows for sure why Mr. Gilson has lung cancer. Nevertheless, doctors believe
that secondhand smoke may cause lung cancer in people who do not smoke because
nonsmokers often breathe in the smoke from other people's cigarettes. {{U}}
{{U}} 2 {{/U}} {{/U}}The US Environmental Protection Agency reports
that about 53,000 people die in the United States each year as a result of
exposure to secondhand smoke.
The smoke that comes from a lit
cigarette contains many different poisonous chemicals. In the past, scientists
did not think that these chemicals could harm a nonsmoker's health. {{U}}
{{U}} 3 {{/U}} {{/U}}They discovered that even nonsmokers had
unhealthy amounts of these toxic (有毒的) chemicals in their bodies. As a matter of
fact, almost all of US breathe tobacco smoke at times, whether we realize it or
not. For example, we cannot avoid secondhand smoke in restaurants, hotels and
other public places. Even though many public places have nonsmoking areas, smoke
flows in from the areas where smoking is permitted. It is even harder for
children to avoid secondhand smoke. {{U}} {{U}} 4 {{/U}}
{{/U}}Research shows that children who are exposed to secondhand smoke are sick
more often than children who live in homes where no one smokes and that the
children of smokers are more than twice as likely to develop lung cancer when
they are adults as are children of nonsmokers. The risk is even higher for
children who live in homes where both parents smoke.
People are
becoming very aware of the dangers of secondhand smoke. {{U}} {{U}}
5 {{/U}} {{/U}}
A. Recently, though, scientists changed
their opinion after they studied a large group of nonsmokers.
B. The Gilsons have been married for 35 years.
C. This smoke is
called secondhand smoke.
D. However, secondhand smoke is
dangerous to all people, old or young.
E. As a result, they
have passed laws which prohibit people from smoking in many public
places.
F. In the United States, nine million children under
the age of five live in homes with at least one smoker.