Althoughmanypeopleagreethatjunkfoodisunhealthyandhaslit...

问题详情：

Although many people agree that junk food is unhealthy and has little nutrition, they are still fond of it.

Why do people like it?

      The name “junk food” first appeared in 1972. Over the years, it has become popular with many people.

Suppliers are fond of it because it is cheap to make and easy to keep for a long time. Many consumers are fond of it because it is easy to buy and it tastes good.

What is junk food?

      Junk food has a lot of fat, salt or sugar and many food additives. Scientists believe that eating a lot of junk food makes people overweight. People may also have their heart disease, high blood pressure and tooth problems if they eat too much junk food.

What food is called junk food?

      This is a difficult question. Different people may give different answers. For example, fast food such as hamburgers, pizza and French fries, is often regarded as junk food. Other food, such as roast potatoes and bread, is not junk food although it has limited nutrition. Also, candy and soft drinks are junk food because they have  a lot of sugar, but honey and grapes are not. Many people prefer to  have cereal at breakfast because it is healthy food, but breakfast cereals may have lots of sugar, salt and fat.

Should children eat junk food?

       When children start eating junk food, they will have less and less  milk and healthy fruit juice. This can make them have weak bones.

     However, some junk food, such as chips, may be good to children because it may have necessary fat. However, since they are fat,  children should not eat too much.

       To many scientists' opinion, junk food is not very harmful when  people have it as a part of a balanced diet.

1．Why can junk food make people overweight?

A．Because it has a lot of fat, salt, sugar and many additives.

B．Because it is unhealthy and has little nutrition.

C．Because it is cheap to make and easy to keep for a long time.

D．Because it is easy to buy and it tastes good.

2．Which of the following is not junk food?

A．Hamburgers.                  B．Pizza.

C．French fries.                  D．Honey.

3．Which of the following is NOT true according to the passage?

A．The name “junk food” didn't appear until 1972.

B．Chips have fat and children should not eat too much.

C．All the scientists think junk food is bad to people.

D．Bread has limited nutrition.

【回答】

本文是一篇说明文。主要介绍垃圾食品出现的时间、人们喜爱它的原因以及人们对垃圾食品的不同认识。

1．解析：推理判断题。根据“What is junk food？”一段可知垃圾食品因为含有丰富的脂肪、糖或盐和许多食品添加剂，所以容易使人发胖，故选A。B是因为它不健康，几乎没有营养；C是因为它的加工费用很低并易于长时间保存；D是因为它买起来方便并吃起来可口，这些都不是垃圾食品能够使人发胖的原因。

*：A

2．解析：细节理解题。根据文中的“but honey and grapes are not”可知选项中的honey不是垃圾食品，故选D。A、B和C都是垃圾食品。

*：D

3．解析：推理判断题。结合文章最后一段可知，很多科学家认为，作为均衡饮食的一部分，垃圾食物对人并非完全有害，故C错误。

*：C

知识点：说明文

题型：阅读理解