单选题 Look at the questions for this part. You will hear a passage about "Health and Fitness ". You will listen to it twice. For Questions 24-30, indicate which of the alternatives A, B, or C is the most appropriate response. Mark one letter A, B, or C on the Answer Sheet.

单选题 Many Americans are getting fatter ______.

A、 because of their poor eating habits and sedentary lifestyle
B、 because of their ignorance about what is good for them
C、 because of their strong dislike for physical exercises

【正确答案】 A

【答案解析】

单选题 What percentage of Americans doesn't exercise in their leisure time according to some studies?

A、 Exactly half.
B、 More than half.
C、 Less than half.

【正确答案】 B

【答案解析】

单选题 What percentage of Americans is reported to be at least 20 percent over their desirable weight in the 1990s?

A、 One fifth.
B、 One fourth.
C、 One third.

【正确答案】 C

【答案解析】

单选题 Which of the following mass media is NOT mentioned as a carrier of information on nutrition and proper diet?

A、 Radio.
B、 Television.
C、 Newspapers.

【正确答案】 A

【答案解析】

单选题 Why has the government required uniform labeling of food since 1994?

A、 Because it wants to help consumers compare the fat and calories in the food they buy.
B、 Because food with uniform labels is not likely to cause disease.
C、 Because uniform labeling will result in low-fat or fat-free food.

【正确答案】 A

【答案解析】

单选题 Which of the following is NOT a reason why Americans are consuming more and more fast food at restaurants?

A、 Fast food is often the cheapest.
B、 Fast food is believed to be nutritious.
C、 Americans simply like fast food.

【正确答案】 B

【答案解析】

单选题 When Americans eat so much restaurant and packaged food, they ______.

A、 can limit fat and calories
B、 can limit fat but not calories
C、 can't limit fat or calories

【正确答案】 C

【答案解析】