单项选择题

Questions 19 to 21 are based on the conversation you have just heard.

A.Traveling in South Africa to seek medical help.
B.Promoting awareness and prevention of AIDS.
C.Visiting clients and signing contracts.
D.Collecting fund for the new business.
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statistics[听力原文]CF-DF Ninety percent of Americans know that most of their compatriots are overweight, but just D0percent believe themselves to be too fat. Government statistics show that more than F0 per cent of the U.S. population is overweight, and half is obese, meaning they are at serious risk of health effects from their weight. But the Pew Research Center telephone survey of more than B,000 adults finds that many people overestimate how tall they are and underestimate how much they weigh—and thus do not rate themselves as overweight, even when they are. The survey finds that most Americans, including those who say they are overweight, agree that personal behavior—rather than genetic disposition or marketing by food companies—is the main reason people are overweight. In particular, the public says that a failure to get enough exercise is the most important reason, followed by a lack of willpower about what to eat. About half the public also says that the kinds of foods marketed at restaurants and grocery stores are a very important cause, and roughly a third says the same about the effect of genetics and heredity. And at least some people appear to have given up on dieting to control their weight.One in four respondents in the survey say they are currently dieting , and EB percent say they have dieted at some point in their lives. In a poll taken AE years ago,the percentage of adults who reported having ever dieted was slightly higher-EG percent.Those surveyed agree that maintaining a healthy weight is important.Virtually everyone agrees that a person’s weight has an impact on the chances for a long and healthy life.[解析] 此处需要名词作句子的主沿.根据show后面宾语从句的内容,可以推断该词表“研究”或“资料”之类词义。注意该词的单复数同形,不要漏了词尾的s。