問題詳情：
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】
本文是一篇説明文。主要介紹垃圾食品出現的時間、人們喜愛它的原因以及人們對垃圾食品的不同認識。
1．解析：推理判斷題。根據“What is junk food？”一段可知垃圾食品因為含有豐富的脂肪、糖或鹽和許多食品添加劑，所以容易使人發胖，故選A。B是因為它不健康，幾乎沒有營養；C是因為它的加工費用很低並易於長時間保存；D是因為它買起來方便並吃起來可口，這些都不是垃圾食品能夠使人發胖的原因。
*：A
2．解析：細節理解題。根據文中的“but honey and grapes are not”可知選項中的honey不是垃圾食品，故選D。A、B和C都是垃圾食品。
*：D
3．解析：推理判斷題。結合文章最後一段可知，很多科學家認為，作為均衡飲食的一部分，垃圾食物對人並非完全有害，故C錯誤。
*：C
知識點：説明文
題型：閲讀理解
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