A long time ago, in 1893, in the United States, some people were talking about fruits and vegetables. They asked, “What are fruits and what are vegetables? How are fruits different from vegetables and vegetables different from fruits?” They talked for a long time and then they decided, “We eat vegetables as part of a meal, but we eat fruits before or after a meal.”
In real life, people do not think the dictionaries give the right meaning of a word. For example, the dictionaries say that tomatoes are fruits. But few people know that. Most people think they are vegetables. They call them vegetables and eat them as vegetables. To most people, fruits mean sweet things like apples, pears, oranges and watermelons.
What are vegetables then? We call many plants and grasses vegetables. Some people think some fruits are vegetables, such as apples, pears and bananas. But to most people, vegetables mean things like potatoes, onions and carrots.
【小题1】A long time ago, some people in the United States _______.

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Scientists have learned a lot about the kinds of people need. They say that there are several kinds of food that people should eat every day, they are: (1) green and yellow vegetables of all kinds; (2) citrus (柑桔) fruits and tomatoes; (3) potatoes and other fruits and vegetables; 94) meat of all kinds, fish and eggs; (5) milk and foods made from milk; (6) bread or cereal (谷类), rice is also in this kind of food; (7) butter, or something like butter.
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People in different countries and different places of the world eat different kinds of things. Foods are cooked and eaten in many different kinds of ways. People in different countries eat at different times of the day. In some places people eat once or twice a day; in other countries people eat three or four times a day. Scientists say that none of the differences is really important. It doesn’t matter whether foods are eaten raw or cooked, canned (罐装的) or frozen (冷冻的). It doesn’t matter if a person eats dinner at 4 o’clock in the afternoon or at eleven o’clock at night. The important thing is what you eat every day.
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There are two problems, then, in feeding the large number of people on the earth. The first is to find some way to feed the world’s population so that no one is hungry. The second is to make sure that people everywhere have the right kinds of food to make them grow to be strong and healthy.
【小题1】According to(依据)the scientists，which of the following groups of food is the healthiest for your lunch？