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 _______.

Do you know blood types?
Special care must be taken in selecting new blood for a badly injured person, who would be killed by the transfusion (输血) if the blood is too different from his own.
There are four basic types of blood A. B. A B. and O. Blood type, like hair and height, comes from parents. Basically, A and B can not be mixed. AB, sometimes called the universal recipient (万能受血者), may receive A or B,. O type, often called the universal donor (万能输血者), gives his blood to any other group. Patients usually receive nothing, but salt or plasma (血浆) until their blood can be matched as exactly as possible in the blood bank of a hospital. There is a relationship between your blood type and your nationality (国籍). Among Europeans, about 42 % have type A while 45 % have type O. The fewest is the type B.
【小题1】Which of the following show the correct relationship in blood transfusion ("→"means giving blood to...)?
   

阅读理解

阅读下列短文，从每题所给四个选项(A，B，C和D)中，选出最佳选项．

　　Every day millions of letters go from one country to another. Letters mailed in Italy are received in Japan. Letters mailed in Canada are received in Africa. On the letters are many different kinds of stamps, bought in different countries.

　　The Universal Postal Union helps each letter get to the right place as quickly as possible. It sets up roles about the size and weight of letters, postcards and small packages (包裹). It has rules that all countries must follow about international postal rates(费用).

　　One hundred years ago, international mail did not move so smoothly. One country did not always accept another country's letters. Letters from some countries were too large to fit into the mailboxes of other countries. Letters traveled by many different routes(路线). Some were lost along the way.

　　Sometimes the person who sent the letter could pay only part of the postage. The person receiving the letter had to pay the rest.

　　The United States was the first to suggest that all countries work together to settle the questions of international mail. In 1947, men from twenty-four countries met in Switzerland to form the Universal Postal Union. Today, more than 120 nations belong to this union. From its office in Switzerland, the union helps the mail to move safely and quickly around the world.

1．From the story we can infer that ________.

[　　]

A．mail is important to all countries

B．not enough letters are sent all over the world

C．all the letters must go to Switzerland first

D．all stamps look exactly the same

2．The Universal Postal Union was formed ________.

[　　]

A．to help move mail quickly around the world

B．to give many men a chance to work

C．to help men meet in Switzerland

D．to look for the lost letters along the way

3．Which statement does this passage lead you to believe?

[　　]

A．Countries around the world need each other's help.

B．Most people do not put enough postage on letters.

C．It is not possible for letters to get lost on the way.

D．Some of the letters are too large to be put into the mailbox.

4．The underlined word“postage”in this passage means ________.

[　　]

A．money paid when you buy a stamp

B．money spent on an envelope

C．the charge for carrying a letter by post

D．the pay postman receives for his work

5．This passage is mainly about ________.

[　　]

A．different kinds of stamps in different countries

B．an organization that makes rules

C．international mail

D．the size and weight of letters

Down-to-earth means someone or something that is honest, practical and easy to deal with. It is 1 to find someone who is down-to-earth. A person who is down-to-earth is easy to talk to and 2 other people as equals. A down-to-earth person is just the 3 of someone who acts important and prouD．

　 Down-to-earth persons 4 be important members of society. 5 they don’t let their importance “go to their heads”. They do not 6 themselves to be better persons than others of less importance. Someone who is filled with his own importance and pride, often without cause, is 7 to have “his nose in the air”. There is 8 way a person with his nose in the air can be down-to-earth.

　　Americans 9 another expression that means almost the same as down-to-earth. The expression is “both-feet-on-the-ground”. Someone with both-feet-on-the-ground is a person with a good 10 of reality. He 11 what is called “common sense”. He may have 12 , but he does not allow them to 13 his knowledge of what is real. The opposite kind of 14 is one who has hid “head-in-the-clouds”. A man with his head-in-the-clouds is a dreamer whose 15 is not in the real world．

　　16 , such a dreamer can be brought back to reality. 17 words from a teacher can usually get a day-dreaming student to put both feet back on the grounD．Usually, the person who is down-to-earth is very 18 to have both feet on the ground．19 we have both our feet firmly on the ground, we are down-to-earth, and we act honestly and openly 20 others. Our lives are like the ground below us, said and strong.

1．A．pleasant     B．sad             C．common D．surprising

2．A．meets       B．welcomes        C．receives   D．accepts

3．A．case       B．kind            C．opposite   D．example

4．A．must        B．may            C．should     D．will

5．A．But        B．So            C．For       D．And

6．A．wish         B．expect          C．desire      D．consider

7．A．said         B．told            C．asked       D．made

8．A．some        B．a              C．no         D．every

9．A．discover    B．find            C．make       D．use

10．A．understanding B．wish        C．reason      D．expectation

11．A．demands B．lacks            C．has       D．likes

12．A．fortunes   B．dreams         C．achievements   D．disadvantages

13．A．block       B．protect         C．Own      D．gain

14．A．idea       B．people         C．attitude    D．person

15．A．mind       B．life            C．body        D．head

16．A．Always    B．Therefore        C．However D．Sometimes

17．A．Sharp      B．All           C．No       D．Bad

18．A．possible   B．probable       C．likely       D．able

19．A．Though    B．Since           C．When      D．Unless

20．A．towards   B．for            C．over      D．Onto