15. B。这些科学家都做了很多实验。
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About 70,000,000 Americans are trying to lose weight(减肥). That is almost 1 out of every 3
people in the United States.
Some people eat 1 food and they hardly have any fats or
sweets. Others do running, exercise with machines, take medicines, or even have
operations. 2 you can see losing weight is 3 work, and it will also cost a lot of
money. But __4 do so many people in the United States
want to lose weight?
Many people in the United States
worry about their look of the body. For many people, looking nice also means to
be 5 . Other people worry about their
health as many doctors 6 overweight is not good.
Most people want to find an 7 way to take off fat, and books of this
kind are very popular. These books tell people how to lose weight. Each year a
lot of new books like these are 8 . Each one says it can easily help
people take fat away.
Losing weight can be 9 . Some overweight people go to
health centres, like La Costa in California.
Men and women 10 several hundred dollars a day at these
health centres. People live there for one week or two, 11 exercise, eating different foods. Meals
there may be just a little. All these work for losing weight. __12__ 4
days on the programme, one woman called Mrs. Warren lost 5 pounds (2.27kg). At $ 400 a day, she spent $ 320 to
lose each pound. But she said she was still __13__ to do so.
Health centres, books, medicines,
operations, running and exercise machines all __14__ a lot of money. So
in the United States,
losing weight may mean losing __15__ too.
