题目内容：

In recent years, many Americans of both sexes and various ages have become interested in improving their bodies. They have become devoted to physical fitness. The need to exercise has almost become natural with many people who have a strong desire to be more physically fit.

By nature, Americans are enthusiastic and energetic about their hobbies and pastimes. They apply their energy to running. As a result, there are running clubs to join and many books and magazines to read about running.

The desire to be physically fit is explained by a “passion” for good health. The high rate of heart attacks in the 1960s caused an increase on the part of the public in improving the human body. Middle-aged men especially suffered from heart attacks. Thus, they are one group strongly interested in more physical exercise. In fact, many doctors encourage their patients to become more physically active, especially those who have sedentary jobs. It is interesting to note that the rate of heart attacks began to decrease in the 1970s and it is still decreasing. Physical fitness enjoys a favored role in the United States at present. It is a new “love” that Americans have valued very much. Will it last long? Only time will tell--- or until another “new passion” comes along.

1.We can learn from the passage that ________ .

A. people’s interest in physical exercise has something to do with their health condition

B. by nature, Americans are stronger and more energetic than others

C. the love for physical exercise won’t last long in American

D. men have a stronger desire than women to take exercise

2.In recent years, many Americans have become interested in improving their bodies because ________ .

A. there are many running clubs to join

B. they are eager for their hobbies and pastimes

C. they have a strong desire to be more physically fit

D. there are many books and magazines about running

3.According to the passage, the underlined word in the last paragraph “sedentary” means ________.

A. challenging intelligence    B. energy-taking

C. needing much sitting    D. sleeping-producing