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  3. The average person swallows about half a ton of food a year—not counting drink—and though the body is remarkably efficient at ex

The average person swallows about half a ton of food a year—not counting drink—and though the body is remarkably efficient at ex

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问题    The average person swallows about half a ton of food a year—not counting drink—and though the body is remarkably efficient at extracting just what it needs from this huge mixture, it can only cope up to a point. If you go on eating too many of some things and not enough of others, you’ll eventually get out of condition and your health will suffer. So think before you start eating. It may look good. It may taste good. Fine! But how much good is it really doing you?
   What you eat and the way it affects your body depend very much on the kind of person you are. For one thing, the genes you inherit from your parents can determine how your body metabolism(新陈代谢) copes with particular foods. The tendency to put on weight rather easily, for example, often runs in the family—which means that they have to take particular care.
   And your parents may shape your future in another way. The way you are brought up shapes some basic attitudes to food—like whether you have a sweet tooth, nibble between meals, take big mouthfuls or eat chips with everything. Eating habits, good or bad, tend to get passed on.
   And then there is your lifestyle. How much you spend on food (time as well as money) , how much exercise you get—these can alter the balance between food and fitness.
   And finally, both your age and your sex may affect this balance. For example, you’ re more likely to put on weight as you get older, especially if you’ re a woman.
   So everybody is different and the important thing is to know yourself.
Before eating something, we are advised to consider______.
选项 A、how good it will taste
B、whether we really need it
C、why we want to eat it
D、if we have eaten too much of it
答案B
解析 根据第一段最后五句“So think before you start eating．It may look good．It may taste good．Fine!But how much good is it really doing you?”可知，吃东西前要三思，食物可能色、香、味俱全，但是要考虑一下它对你真正有多少好处。由此可推知，在吃东西前，我们要考虑一下自己是否真的需要它。故选B。
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