The common cold is the world's most widespread illness, which is plagues (瘟疫) that flesh receives. The most widespread fallacy (谬误) of all is that colds are caused by cold. They are not. They are caused by viruses passing on from person to person. You catch a cold by coming into contact, directly or indirectly, with someone who already has one.

If cold causes colds, it would be reasonable to expect the Eskimos to suffer from them forever. But they do not. And in isolated arctic regions explorers have reported being free from colds until coming into contact again with infected people from the outside world by way of packages and mail dropped from airplanes.

　　During the First World War soldiers who spent long periods in the trenches (战壕) cold and wet, showed no increased tendency to catch colds. In the Second World War prisoners at the notorious Auschwitz concentration camp (奥斯维辛集中营), naked and starving, were astonished to find that they seldom had colds.

　　At the Common Cold Research Unit in England, volunteers took part in experiments in which they gave themselves to the discomforts of being cold and wet for long stretches of time. After taking hot baths, they put on bathing suits, allowed themselves to be dipped with cold water, and then stood about dripping wet in drafty room. Some wore wet socks all day while others exercised in the rain until close to exhaustion. Not one of the volunteers came down with a cold unless a cold virus was actually dropped in his nose.

　　If, then, cold and wet have nothing to do with catching colds, why are they more frequent in the winter? Despite the most pains-taking research, no one has yet found the answer. One explanation offered by scientists is that people tend to stay together indoors more in cold weather than at other times, and this makes it easier for cold viruses to be passed on.

　　No one has yet found a cure for the cold. There are drugs and pain-killer pills such as aspirin, but all they do is relieve the symptoms.

1.How many examples are offered by the writer to support his argument?

2.Which of the following does not agree with the chosen passage?

3.Arctic explorers may catch colds when _______.

4.Volunteers taking part in the experiments in the Common Cold Research Unit _______.

5.The passage mainly discusses _______.

The common cold is the world's most widespread illness, which is plagues (瘟疫) that flesh receives. The most widespread fallacy (谬误) of all is that colds are caused by cold. They are not. They are caused by viruses passing on from person to person. You catch a cold by coming into contact, directly or indirectly, with someone who already has one.
If cold causes colds, it would be reasonable to expect the Eskimos to suffer from them forever. But they do not. And in isolated arctic regions explorers have reported being free from colds until coming into contact again with infected people from the outside world by way of packages and mail dropped from airplanes.
　　During the First World War soldiers who spent long periods in the trenches (战壕) cold and wet, showed no increased tendency to catch colds. In the Second World War prisoners at the notorious Auschwitz concentration camp (奥斯维辛集中营), naked and starving, were astonished to find that they seldom had colds.
　　At the Common Cold Research Unit in England, volunteers took part in experiments in which they gave themselves to the discomforts of being cold and wet for long stretches of time. After taking hot baths, they put on bathing suits, allowed themselves to be dipped with cold water, and then stood about dripping wet in drafty room. Some wore wet socks all day while others exercised in the rain until close to exhaustion. Not one of the volunteers came down with a cold unless a cold virus was actually dropped in his nose.
　　If, then, cold and wet have nothing to do with catching colds, why are they more frequent in the winter? Despite the most pains-taking research, no one has yet found the answer. One explanation offered by scientists is that people tend to stay together indoors more in cold weather than at other times, and this makes it easier for cold viruses to be passed on.
　　No one has yet found a cure for the cold. There are drugs and pain-killer pills such as aspirin, but all they do is relieve the symptoms.
【小题1】How many examples are offered by the writer to support his argument?

完形填空：

　　Today our knowledge of food and what it does to our bodies is far more advanced than 1 the old times. Now we know about vitamins and 2 each kind of vitamin helps in the 3 of a particular part of our body. 4 on the market all kinds of vitamins which one can take to 5 one's lack of certain important things which are needed 6 good health. Of course if we eat well and properly, the food that we eat will 7 our body and so there is 8 to take any kinds of vitamin 9 our doctor tells us that out bodies are 10 of something that can be supplied by them.

　　Generally speaking, everything we eat 11 some good to our body but if we eat 12 of one kind of food and pay 13 attention to others. We may have too much of one kind and not 14 on others. Then we may be 15 trouble.

　　We are often told 16 we must eat some meat at each meal in order to get the necessary proteins. That is only 17 true for proteins are not found only in meat. We can also get them 18 some vegetables.

　　The best advice about 19 to eat is that we should eat all kinds of food 20 never too much of any.

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完形填空

　　A few years ago, whenever people used hair spray or insect spray or spray paint, they were destroying an important part of our world. 1 no one knew it, the 2 in spray cans were 3 the ozone(臭氧) layer.

　　No one has ever 4 the ozone layer because it isn't on the 5 . It is part of the 6 , a thick blanket of air that 7 the world. The atmosphere is made up of many gasses, especially nitrogen(氮) and oxygen. 8 to the earth, the atmosphere is 9 and heavy, but as it 10 farther away from the earth, the atmosphere gets thin. There the energy 11 the sun changes the 12 the gasses do. For instance, oxygen atoms usually travel in the air, connected together in 13 . But high in the atmosphere, the sun's energy causes three oxygen atoms to 14 together instead of two. These 15 of three oxygen atoms are called ozone. And the 16 high in the air where regular oxygen 17 to ozone is called the ozone layer.

　　The ozone layer is very important to 18 on earth even though it is far away. It 19 . the dangerous rays from the sun. Even more important, it helps keep the earth 20 .

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　　——Shall Mary come and play computer games?

　　——No, ________ she has finished her homework.

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A．when　　　　B．if

C．unless　　　　D．once