完形填空。 Every person needs water and a diet of healthy foods. These foods should contain some fat, some fiber, a little salt and so on. People need energy __1______. They eat different kinds of food which change into energy. The energy is___2______in calories. Even when you __3__ , you are using energy - about 65 calories an hour. __4__ you are at school, or walking home, your body is burning up 100 calories an hour. When playing football or basketball, you __5__ be using 400 calories an hour. On Sports Day, during the relay race, you will use most of all, __6__ as much as 650 calories an hour. The Chinese diet is considered to be the healthiest in the world. It contains a lot of fruit and green vegetables. It is __7__ in fiber and low in sugar and fat. The Chinese eat less sugar than many other countries in theworld. That is __8__ lots of people in China have healthy white teeth. People in the Western world do not eat such healthy foods. They eat __9__ fat and sugar and don’t take enough __10__ . Because of this, they __11__ weight very easily. Their diet contains a lot of fat in the __12__ of potato crisps, potato chips, butter, cream and chocolate. They eat a lot of sugar which exist in cakes, soft drinks,__13__and so on. The result is that many of them become fat.__14______some have bad teeth. In some parts of Britain, one person in ten, __15__ the age of thirty, has no teeth left. (     )1. A. for life (     )2. A. measuring (     )3. A. are asleep (     )4. A. While (     )5. A. must (     )6. A. surely (     )7. A. rich (     )8. A. how (     )9. A. much too (     )10. A. exercises (     )11. A. put on (     )12. A. type (     )13. A. sweets (     ) 14. A. But (     )15. A. at B. to live B. taken B. fall asleep B. During B. can B. usually B. poor B. why B. many too B. food B. gain on B. form B. sweet B. Or B. for C. to live with C. measured C. go to sleep C. As C. need C. perhaps C. good C. what C. too many C. work C. get on C. kind C. candy bar C. And C. with D. for a living D. measure D. go to bed D. If D. might D. hardly C. bad D. that D. too much D. exercise D. put up D. sort D. sweet thing D. So D. by