2. 外语
  3. Today our knowledge of food and what it does for our bodies is far more advanced than that of the old times. Now we know about v

Today our knowledge of food and what it does for our bodies is far more advanced than that of the old times. Now we know about v

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问题     Today our knowledge of food and what it does for our bodies is far more advanced than that of the old times. Now we know about vitamins and how each kind of vitamin helps in the growth of a particular part of our body. There are on the market all kinds of vitamins which one can take to make up for one’s lack of certain important things that are needed for good health. Of course, if we eat well and properly, the food we eat will take care of our body and so there is no need to take any kinds of vitamins unless our doctor tells us that our bodies are short of something that can be supplied by them.
    Generally speaking, everything we eat does some good to our body, but if we eat too much of one kind of food and pay too little attention to others, we may have too much of one kind and not enough of others. Then we may be in trouble.
  We are often told that we must eat some meat at each meal in order to get the necessary proteins. That is only partly true, for proteins are not found only in meat. We can also get them from some vegetables.
    The best advice about what to eat is that we should eat all kinds of food but never too much for any.
Eat Healthy
    Our knowledge of food: 1. far more advanced
                           2. each kind of vitamin helps in the growth of(46)______   of our body
    No need to eat vitamins: 1. if we eat(47)______
                             2. unless doctor tells us that (48)______    vitamins.
    Where to find proteins: can be found in (49)______    as well as in meat.
    Suggestions to us: eat every kind of food but (50)______    of one kind.
选项
答案our bodies need
解析 根据文章第一段第四句后半部分...so there is no need to take any kinds of vitamins unless our doctor tells us that our bodies are short of something that can be supplied by them.(……因此没有必要去吃维生素，除非医生告诉我们身体内缺少某种元素需要用维生素来补充)可得出答案。如果填写句中的our bodies are short of就超出三个同，不符合题目要求，所以可改成our bodies need。
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