6．
阅读理解
Scientists have learned a lot about the kinds
of foods people need. They say that there are several kinds of foods that
people should eat every day. They are：green and
yellow vegetables of all kinds; citrus(柑橘)fruits and
tomatoes; potatoes and other fruit and vegetables; meat of all kinds, fish and
eggs; milk and foods made from milk; bread or cereal(谷类食物), rice is also in this kind of food; butter, or something like
butter.
People in 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. 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.
There are two problems, then, in feeding
the large number of people on the Earth. The first is to find some ways 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 foods to make them grow to be
strong and healthy.
