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  3. （非英语类学生必做） The average person swallows about half-a-ton of food a year—not counting drink—and though the body is remarkably

（非英语类学生必做） The average person swallows about half-a-ton of food a year—not counting drink—and though the body is remarkably

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问题 （非英语类学生必做）
    The average person swallows about half-a-ton of food a year—not counting drink—and though the body is remarkably efficient at extracting(摄取) just what it needs from this huge mixture, it can only cope up to a point. If you go on eating too much 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 things, 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 families 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 (吃零食) 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 文章第一段提到我们可能对于某些食物食用过多，而忽略了其他一些食物。因此在最后一句作者希望我们在食用一些事物前要好妊考虑，这些食物可能好看，也可能好吃，但这些食物对我们究竟有多少好处?换句话说，这些食物我们究竟需要不需要?因此选择选项B。
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