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  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 vi

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 vi

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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 Healthily
Our knowledge of food: 1) far more advanced
                     2) each kind of vitamin helps in the growth of【R1】______of our body
No need to eat vitamins: 1) if we eat【R2】______
                     2) unless our doctor tells us that【R3】______vitamins
Where to find proteins: can be found in【R4】______as well as in meat
Suggestions to us: eat every kind of food but【R5】______of one kind
【R5】
选项
答案never too much
解析 在文章最后一段，作者对人们的饮食提出了自己的建议：我们应该吃各种食物，但每种食物都不要吃太多。对照原文内容，可得出答案为never too much。
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