They ______ that wild animals should be left in the wild and not used for entertainment.

A. discussed        B. argued        C. quarreled.    D. talked

Today almost everyone knows computers and the Internet. If I ask you “What is the most important in your life?”, maybe you will say “Computers and the Internet.”

The first computer was made in 1946. It was very big but it worked slowly. Today computers are getting smaller and smaller. But they work faster and faster. What can computers do? A writer has said, “People can’t live without computers today.”

The Internet came a little later than computers. It is about twenty-five years later than computers. But now it can be found almost everywhere. We can use it to read books, write letters, do shopping, play games or make friends.

Many students like the Internet very much. They often go into the Internet as soon as they are free. They make friends on the Internet and maybe they have never seen these friends. They don’t know their real names, ages, and even sex (性别). They are so interested in making the “unreal friends” that they can’t put their heart into study. Many of them can’t catch up with others on many subjects because of that.

We can use computers and the Internet to learn more about the world. But at the same time, we should remember that not all the things can be done by computers and the Internet.

The Internet cannot be used for __________．

       A. studying         B. shopping      C. thinking         D. playing

When the computer was invented, it was__________．

       A. large and worked quickly           B. small and worked slowly

       C. large but worked slowly            D. small but worked quickly

The Internet was born in about __________．

       A. 1960           B. 1970                C. 1980     D. 1985

Which of the following is true?

       A. Few students like going into the Internet.

       B. Students use the Internet to make “unreal friends”.

       C. These “unreal friends” often meet each other.

       D. Students know the friends on the Internet very well.

What does the writer think of the Internet?

       A. It is wonderful.              B. It can make students study harder.

       C. It is not good for students.      D. It is helpful, but we can’t do everything on it.

The food we eat seems to have profound effects on our health. Although science has made enormous steps in making food more fit to eat, it has, at the same time, made many foods unfit to eat. Some research has shown that perhaps eighty percent of all human illnesses relate to diet and forty percent of cancer relates to the diet as well, especially cancer of the colon. Different cultures are more likely to cause certain different illnesses because of the food that is characteristic in these cultures.

That food is connected with illness is not a new discovery. In 1945, about 35 years ago, government researchers realized that nitrates, commonly used to preserve color in meats, and other food additives, caused cancer. Yet, these carcinogenic  additives remain in our food, and it becomes more difficult all the time to know which things on the packaging labels of processed food are helpful or harmful. The additives which we eat are not all so direct. Farmers often give penicillin to beef and living animals, and because of this, penicillin has been found in the milk of treated cow. Sometimes similar drugs are given to animals not for medical purposes, but for financial reasons. The farmers are simply trying to fatten the animals in order to obtain a higher price on the market. Although the Food and Drug Administration (FDA) has tried repeatedly to control these procedures, the practices continue.　　

What is the best possible title of the passage?

　 A. Drug and Food             　B. Cancer and Health

　C. Food and Health              D. Health and Drug

Which of the following statements is NOT true?

　 A. Drugs are always given to animals for medical reasons.

　 B. Some of the additives in our food are added to the food itself and some are

given to the living animals.

　 C. Researchers have known about the potential dangers of food additives for over

thirty-five years.

　 D. Food may cause forty percent of cancer in world.

How has science done something harmful to mankind?

　A. Because of science, diseases caused by polluted food haven’t been virtually

eliminated.

　 B. It has caused a lack of information concerning the value of food.

　 C. Because of the application of science, some potentially harmful substances

have been added to food.

　D. The scientists have preserved the color of meat, but not of vegetables.

What are nitrates used for?

　 A. They preserve flavor in packaged foods.

　 B. They preserve the color of meats.

　 C. They are the objects of research.

The word ‘carcinogenic’ most nearly means ‘_________’.

　 A. trouble-making                 B. color-maintaining

　 C. money-making                 D .cancer-causing

Today almost everyone knows computers and the Internet. If I ask you “What is the most important in your life?”, maybe you will say “Computers and the Internet.”

The first computer was made in 1946. It was very big but it worked slowly. Today computers are getting smaller and smaller. But they work faster and faster. What can computers do? A writer has said, “People can’t live without computers today.”

The Internet came a little later than computers. It is about twenty-five years later than computers. But now it can be found almost everywhere. We can use it to read books, write letters, do shopping, play games or make friends.

Many students like the Internet very much. They often go into the Internet as soon as they are free. They make friends on the Internet and maybe they have never seen these friends. They don’t know their real names, ages, and even sex (性别). They are so interested in making the “unreal friends” that they can’t put their heart into study. Many of them can’t catch up with others on many subjects because of that.

We can use computers and the Internet to learn more about the world. But at the same time, we should remember that not all the things can be done by computers and the Internet.

The Internet cannot be used for __________．

       A. studying         B. shopping      C. thinking         D. playing

When the computer was invented, it was__________．

       A. large and worked quickly           B. small and worked slowly

       C. large but worked slowly            D. small but worked quickly

The Internet was born in about __________．

       A. 1960           B. 1970                C. 1980     D. 1985

Which of the following is true?

       A. Few students like going into the Internet.

       B. Students use the Internet to make “unreal friends”.

       C. These “unreal friends” often meet each other.

       D. Students know the friends on the Internet very well.

What does the writer think of the Internet?

       A. It is wonderful.              B. It can make students study harder.

       C. It is not good for students.      D. It is helpful, but we can’t do everything on it.

Millions of people around the world cook their food over smoky fire every day.It is often difficult to find wood for the fire .People who do not have wood must spend large amounts of money on cooking fuel. However, there is a much easier way to cook food using energy from the sun.
Solar cooker, or ovens,have been used for centuries.A Swiss scientist made the first solar oven in seventeen sixty-seven. Today ,people are using solar cookers in many countries around the world. People use solar ovens to cook food and to heat drinking water to kill bacteria and other harmful organisms.
There are three kinds of solar ovens.The first is a box cooker, It is designed with a special wall that shines or reflects sunlight into the box .Heat gets trapped under a piece of glass or plastic covering the top of the cooker. A box oven is effective for slow cooking of large amonts of food.
The second kind of solar oven is a panel cooker. It includes several flat walls.or panels.that directly reflect the sun’s light onto the food. The food is inside a separate container of plastic or glass that traps heat energy. People can build panel cookers quickly and with very few supplies. They do not cost much.In Kenya ,for example ,panel cookers are being manufactured for just two dollars.
The third kind of solar oven is a parabolic cooker.It has rounded walls that aim sunlight directly into the bottom of the oven .Food cooks quickly in parabolic ovens .However, these cookers are hard to make.They must be re-aimed often to follow the sun .Parabolic cookers can also cause burns and eye injuries if they are not used correctly.
You can make solar ovens from boxes or heavy paper. They will not catch fire. Paper burns at two hundred thirty-two degrees Celsius. A solar cooker never gets that hot. Solar ovens cook food at low temperatures over long periods of time. This permits people to leave food to cook while they do other things.
1.What is the main purpose of the author in writing the passage?
A.To tell the readers how to make solar ovens.
B.To advertise the solar ovens.
C.To give the readers brief introduction of solar ovens.
D.To help readers to save cost on fuel.
2.According to the passage we can conclude that ______.
A.panel cooker is the cheapest oven of the three
B.panel cooker is easy to make
C.box cooker is easy to make
D.box cooker is the most effective oven
3.If you have much food to cook ,you’d better choose      .