When you enter a supermarket, you see shelves full of food. You walk between the shelves. You carry a shopping basket with your food in it.

You probably hear soft, slow music as you walk between the shelves. If you hear fast music, you walk quickly. The supermarket plays slow music. You walk slowly and have more time to buy things.

Maybe you go to the meat department first. There is some meat on sale, and you want to find it. The manager of the supermarket knows where customers enter the meat department. The cheaper meat is at the other end of the meat department, away from where the customers enter. You have to walk by all the expensive meat before you find the cheaper meat. Maybe you will buy some of the expensive meat instead of the meat on sale.

The department selling milk and milk products such as butter and milk powder is called the dairy department. Many customers like milk that has only a little butter fat in it. One store has three different jars of low fat milk. One says “1 percent fat” on the jar. The second says “99 percent fat free”, the third says “Low fat” in big letters and “1%”in small letters. As you can see, all the milk has the same amount of fat. The milk is all the same. However, in this store the three jars of milk cost three different amounts of money. Maybe the customers will buy the milk that costs the most.

Most of the food in supermarkets is very pleasing. It all says “Buy me!” to the customers. The expensive meat says “Buy me” as you walk by. The expensive milk jar says “Buy me! I have less fat.”

77. The manager of the supermarket knows______.

A. which customers like low fat milk 　　　　　　　B. which customers like slow music

C. where customers enter the meat department 　　　D. where customers come from

78. When you walk by the expensive meat, maybe you will______.

A. buy some 　　　B. try to find fresh fruits 　　　C. look for low fat milk 　　D. just walk on

79. There are three different jars of low fat milk and_____.

A. one has more fat than the other two 　　　  B. they are almost the same amount of money

C. one has less fat than the others 　　 　　   D. they all have the same amount of fat

80. Supermarket managers make the food pleasing so that_____.

A. there will be more buyers 　　　B. buyers will be proud

C. it is good and expensive 　　 　D. they can raise the prices

 ( D )

Your body works 24 hours a day. It’s always building and repairing, feeding and cleansing itself. Its goal is to be ready for your every movement, breath, and thought. The quality of your life depends on how well your body works. And how well your body works depends on how much energy it gets. Energy comes from the food you eat. Food contains nutrients that your body needs for growth and energy.

By eating a balanced diet, your body gets the six important nutrients it needs. Minerals（矿物质） are nutrients that build bones and teeth. Minerals also form red blood cells and other substances. Water aids digestion and waste removal. Carbohydrates（碳水化合物） give your body its main source of energy. Two carbohydrates are sugars from foods such as fruits and vegetables and starches found in rice, potatoes, and bread. Fats help build cell membranes（膜）. Proteins repair and grow body tissues（组织）. Finally, vitamins help your body use carbohydrates, fats, and proteins.

The United States Department of Agriculture（USDA） has created a nutritional food pyramid（金字塔）. It shows the daily number of servings you should eat from five food groups. The food pyramid has four levels. The base of the pyramid is the largest level. It contains the bread, cereal, rice, and pasta group from which you need six to eleven servings. The next level has two food groups: vegetables and fruits. The USDA recommends three to five servings of vegetables and two to four servings of fruit. The third level also has two groups: the milk, yogurt, and cheese group and the meat, poultry, fish, dry beans, eggs, and nuts group. You need two to three servings from each of these groups. The top of the pyramid is the smallest level. It contains fats, oils, and sweets. These foods have few nutrients, so eat them sparingly（有节制地）.

1.What is the main idea for this passage_________?

A．Eating a balanced diet gives your body the energy it needs.

B．The top of the pyramid is the smallest level.　　　　

C．Meat, poultry, fish, dry beans, eggs, and nuts are on the third level.

D．We should have a nutrition food pyramid.

2.The first paragraph suggests that __________?

A． food is something that cleanses your body.

B．food can improve the quality of your life.

C．food should be eaten at night as well as during the day.

D．food will make it easier for you to exercise.

3.By eating a balanced diet, your body gets the      important nutrients it needs.

A．four             B．five              C．six               D．seven

4.A balanced diet________.

A．is made up of foods from five food groups.

B．includes many foods containing fat.

C．includes six to eleven servings of fruit.

D．can be got by taking vitamins.

5.To help the reader understand the six nutrients needed by the body, the author________.

A．describes the five basic food groups.

B．explains what a balanced diet is.

C．writes the details of each nutrient.

D．tells the number of daily servings needed from each food group.