D
The Key to Your Health
A car needs gas to run and your body also needs food to work for you. Eating the right kind of food is very important. It can help your body grow strong to take care of what you eat.
There are four main food groups altogether. The dairy group has food like milk, cheese and sour milk. The other three groups are the meat and fish group, the fruit and vegetable group, and the bread and rice group. Each meal should have at least one food from all four main groups. With all these food together, you will be given enough energy during the day.
It is easy to get into bad eatinghabits. You may eat your breakfast in a hurry to get to school on time. Or you may not have time for a good lunch. It may seem easy to. But you will find yourself tired in these days and you can not think quickly.
Watching what you eat will help your body remain healthy and strong. It is also good to take some exercise. It will help you eat more if you take a walk or play games in the open air. Having a good eating habit with some exercise is the key to your health.
47.Which of the following diets do you think is the best one?
A.Corn, fish，cream and pork.
B.Eggs, tomatoes and chicken.
C.Milk, bread, cabbages and beef.
D.Rice, beancurd, apples, fish and chicken.
答案：C 细节理解题。从文中第二段“Each meal should have at least one food from all four main groups.”这句话可以看出，只有奶类、鱼肉类、蔬菜水果类和米面类四种合理搭配才算是最佳饮食。
48.Which of the following is a good eating habit?
A.Going to school without any breakfast.
B.Finishing your lunch in a very short time.
C.Eating fish and chips for supper all the time.
D.Having at least one food from all four groups in each meal.
答案：D 细节理解题。从第三段可知A、B、C三项均为不良饮食习惯;文章第二段“Each meal should have at least one food from all four main groups. With all these food together, you will be given enough energy during the day.”这句话表明D项为一种好的饮食习惯。
49.In this passage the writer mainly tells us that ________.
A.the right kind of food with exercise will keep you healthy
B.taking exercise can keep your body strong
C.every person needs food to grow well
D.enough energy helps people think more quickly
答案：A 归纳总结题。在文章最后一段中作者告诉我们要注意饮食，加点适当的锻炼，才能保持身体健康。选项B、C、D都不全面。
50.The underlined word “dairy” in the second paragraph means ________.
A.the shop that sells milk and butter
B.the food made out of cows such as milk and butter
C.a farm where cows are kept
D.a place where milk products are made
答案：B 词义理解题。必须从上下文来理解。从第二段的第二句话“The dairy group has food like milk, cheese and sour milk.”可以看出milk，cheese和sour milk都是奶或奶制品。
