题目内容
Today there are 6 billion people on the earth. By the year 2050 there may be 12.5 billion. This is a lot of people to feed．We need more food．
One way to produce more food is by growing stronger plants. For thousands of years, farmers have made plants better. Every season, they pick the best plants for the next season. It works very slowly. Since 1983, scientists have been able to change plants more quickly by changing their genetic material（遗传物质）. Foods from plants grown in this way are called genetically modified foods（转基因食品）, or GM foods.
By changing the genetic material of a plant, it is possible to make new plants. They make plants which are strong against plant diseases. They can also help with our diseases: a kind of rice is being prepared （准备）, for example, which stops people from becoming blind．
Rich countries produce GM foods because they are easy to grow and bring in more money. Poor countries are interested in them because they help produce more food．
GM plants are not natural. No one knows how good or bad they are. Making GM foods is only one way of feeding people in 2050. There are strong feelings against them, because they are unnatural. They may feed people, then hurt them or their children later. But, both rich and poor countries are very interested in their use, and they are not going to go away. In 2050, we may think differently about them.
1. GM foods are made up by .
A．farmers B．workers C．Scientists D．plants
2. What are the good things about GM foods? .
A．They make plants strong against disease B．They are unnatural
C．they can help in human disease D．Both A and C
3. GM foods .
A．are a quick way to produce food B．grow in the wild
C．are safe D．are grown only in rich countries
4. Why do some people not like GM foods?
A．Because they are not useful. B．Because are not helpful
C．Because they are not natural D．Because they are not cheap.
5. From the reading we know that .
A．GM foods will disappear one day in the future
B．GM foods will not disappear in the future
C．people will be interested in GM foods
D．people will have to stop using GM foods
CDACB
A rabbit is running into his hole. You may ask, “What happened?”
Well, when a rabbit sees something dangerous, it runs away. Its tail moves up and down as it runs. When other rabbits see this tail moving up and down, they ran, too. They know there is danger. The rabbit has told them something without making a sound. It has given them a signal.
Many other animals use this kind of language. When a bee finds some food, it goes back to his home. It can’t tell the other bees where the food is by speaking to them, but it does dance in the air. This tells the bees where the food is.
But animals say things by making sounds. A dog barks, for examples, when a stranger comes near. A cat purrs(发出呼噜呼噜的声音) when pleased. Some birds make several different sounds, each with its own meaning.
But human beings have something that no animals have---- a large number of words about things, actions, feelings or ideas. We are able to give each other information to tell or inform other people what is in our mind or how we feel. By writing words down we can remind ourselves of the things that have happened, or send messages to people far away. No animals can do this. No animals has the wonderful power of language.
No one knows how man learned to make words. Somehow he learned to make them. As centuries went by, he made more and more new words. This is what we mean by language.
People in different countries made different kinds of words. Today there are about fifteen hundred different languages in the world. A very large English dictionary, for examples, contains four or five hundred thousand words. But we don’t know all these. The words we know are called vocabulary. We should try to make our vocabulary larger. Read as many books as possible. When we met a new word, look it up in the dictionary. A dictionary is the most useful book.
【小题1】What’s the meaning of the underlined word?
| A．标语 | B．信号 | C．唱片 | D．图像 |
| A．by giving signals | B．by making different sounds |
| C．by purring | D．by barking |
| A．give the others information |
| B．express their actions and feelings with words |
| C．tell others how they feel |
| D．make different sounds, each with its own meaning. |
| A．all the words that we know | B．more and more words we use |
| C．all the words we need | D．the dictionary which contains thousands of words |
| A．Make more and more new words |
| B．look up some new words in a dictionary |
| C．learn more language |
| D．Try to read as many books as possible |
Today there are 6 billion people on the earth. By the year 2050 there may be 12.5 billion. There will be a lot of people to feed. We need more food.
One way to produce more food is by growing stronger plants. For thousands of years, farmers have made plants better. Every season, they pick the best plants for the next season. It works very slowly. Since 1983, scientists have been able to change plants more quickly by changing their genetic material(遗传物质). Foods from plants grown in this way are called genetically modified foods(转基因食品), or GM foods.
By changing the genetic material of a plant, it is possible to make new plants. They make plants which are strong against plant diseases. They can also help in our diseases: a kind of rice is being prepared, for example, which stops people from becoming blind.
Rich countries produce GM foods because they are easy to grow and bring in more money. Poor countries are interested in them because they help produce more food.
GM plants are not natural. No one knows how good or bad they are. Making GM foods is only one way of feeding people in 2050. There are strong feelings against them, because they are unnatural. They may feed people, then hurt them or their children later. But, both rich and poor countries are very interested in their use, and they are not going to go away. In 2050 we may think differently about them.
1.GM foods ________.
|
A．are a quick way to produce food |
|
B．grow in the wild |
|
C．are safe |
|
D．are grown only in rich countries |
2.Why do some people not like GM foods?
|
A．They are not useful. |
|
B．They are not helpful. |
|
C．They are not natural. |
|
D．They are not cheap. |
3.From the reading we know that ________.
|
A．GM foods will disappear one day in the future |
|
B．GM foods will not disappear in the future |
|
C．people will not be interested in GM foods |
|
D．people will have to stop using GM foods |