In the US, elementary and middle schools are advised to give students two and a half hours of physical activity a week. That is what the Centers for Disease Control and Prevention and the American Heart Association recommend. They say high schools should provide about four hours of physical activity each week.
Yet many schools across the country have reduced their physical education programs. Criticism of the cuts has led in some places to efforts to give students more time for exercise, not less. The future health of Americans may depend on it. A study reports that life expectancy has fallen or is no longer increasing in some parts of the United States. The situation is worst among poor people in the southern states, and especially women. Public health researchers say it is largely the result of increases in obesity，smoking and high blood pressure. They also blame differences in health services around the country.
In 2006, a study found that only 4% of elementary schools provided daily physical education all year for all grades. This was true of 8% of middle schools and 2% of high schools. The study also found that 22% of all schools did not require students to take any P. E. One problem for P. E. teachers is that schools are under pressure to put more time into academic subjects.
Also, parents may agree that children need exercise in school. Yet many parents today still have bad memories of being chosen last for teams because teachers favored the good athletes in class.
But experts say P. E. classes have changed. They say the goal has moved away from competition to personal performance, as a way to build a lifetime of activity. These days, teachers often lead activities like weight training and yoga.
Some parents like the idea of avoiding competitive sports in P. E. class. Yet others surely dislike that idea. In the end，schools may find themselves in a no-win situation.
The best title of the passage is __________.

A．Physical education aims for active lives

B．The future health of Americans

C．22% of all schools in the US don't require students to take any P. E.

D．Avoid competitive sports in P. E.

Which statement is TRUE?

A．High schools in the US should provide fewer hours of physical activity than that in elementary and middle schools.

B．Not all schools in the US have reduced their physical education programs.

C．22% of all schools in the US require students to take any P. E.

D．8% of middle schools provide daily physical education all year for all grades now.

The reason why the author gives Paragraph 3 is __________.

A．to explain schools are under pressure to put more time into academic subjects

B．that students don't like P. E. classes at all

C．to support his opinion in Paragraph 2

D．to explain why life expectancy has fallen in some parts of the US

Paragraph 4 implies __________.

A．parents may agree that children need exercise in school

B．P. E. teachers lay particular stress on competition

C．many parents didn't like P. E. class when they were young

D．many students spent more time on academic subjects

The underlined sentence in the last paragraph means __________.

A．schools will go on reducing their physical education programs

B．schools must listen to different opinions from different parents

C．schools will think much of life expectancy

D．schools will be trapped in failure or disappointment

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