Space is a dangerous place, not only because of meteors(流星), but also because of rays from the sun and other stars. The atmosphere again acts as our protective blanket on the earth. Light gets through, and this is necessary for plants to make the food which we eat. Heat, too, makes our environment suitable to live. Various kinds of rays come through the air from outer space, but enormous quantities of radiation from the sun are screened off. As soon as men leave the atmosphere they are exposed to this radiation but their spacesuits or the walls of their spacecraft, if they are inside, do prevent a lot of radiation damage.
Radiation is the greatest known danger to explorers in space. The unit of radiation is called “rem”. Scientists have reason to think that a man can put up with far more radiation than 0.1 rem without being damaged; the figure of 60 rems has been agreed on. The trouble is that it is extremely difficult to be sure about radiation damage a person may feel perfectly well, but the cells of his or her sex organs may be damaged, and this will not be discovered until the birth of deformed(畸形的)children or even grandchildren. Missions of the Apollo flights have had to cross belts of high radiation and, during the outward and return journeys, the Apollo crew accumulated a large amount of rems. So far, no dangerous amounts of radiation have been reported, but the Apollo missions have been quite short. We simply do not know yet how men are going to get on when they spend weeks and months outside the protection of the atmosphere, working in a space laboratory. Drugs might help to decrease the damage done by radiation, but no really effective ones have been found so far.
49．According to the first paragraph, the atmosphere is necessary to man because of the following reason EXCEPT________
A．protecting him against the harmful rays from space
B．providing sufficient light for plant growth
C．suppling the heat necessary for human survival
D．screening off the falling meteors
50．We learn from the passage that ________
A．exposure to even tiny amounts of radiation is fatal
B．the effect of exposure to radiation is slow in coming
C．radiation is avoidable in space exploration
D．astronauts in spacesuits needn’t worry about radiation damage
51．The harm radiation that has been done to the Apollo crew members ________
A．is insignificant B．is enormous C．seems overestimated D．remains unknown
52．It can be inferred from the passage that________
A．the Apollo mission was very successful
B．the protection from space radiation is no easy job
C．astronauts may possibly have deformed children or grandchildren
D．radiation is not a threat to well-protected space explorers
53．Which of the following is TRUE?
A．Space is dangerous only because of meteors.
B．Explorers in space have to avoid the damage from radiation
C．We have got effective ways to treat illnesses caused by radiation.
D．The atmosphere doesn’t screen off radiation
Lifeguard, sportscaster, movie star, governor, president——there wasn’t much Ronald Reagan didn’t do in life.
“The world was a vast opportunity for him,” Lou Cannon wrote in his biography（传记） of the former US president, who died on June 5，2004， aged 93.
Reagan’s final years saw him fight a losing battle against Alzheimer’s disease（老年痴呆症）. But his positive attitude toward life has given hope to many people.
Born in 1911 to a poor family in a small town in Illinois, his father was a failed salesman who drank too much. It was in these difficult times, though, that Reagan developed the powerful optimism（乐观） that would serve him so well. He always believed better times lying ahead, and this was reflected in his high school yearbook entry. “Life is one grand, sweet song, so start the music,” he wrote.
As a teenager, Reagan spent summers working as a lifeguard at a local beach, saving 77 lives in seven years. He graduated from college in 1932 with a degree in economics and sociology. But America was still in the middle of the Great Depression, and jobs were hard to find. Reagan finally found work as a radio sports announcer and this road led him to Hollywood in 1937.
During the 20---year film career, he never became a leading star. As in his lifeguard days, Reagan loved to play the hero and only took the role of a bad guy once in more than 50 films.
A talented speaker who was always able to connect with his audience, Reagan became involved in politics in the 1950s. This popular touch led to him being elected the governor of California in 1967.
All the while Reagan was in California, he had his eye on the White House. In 1980, aged 69, he became the oldest man ever elected president.
He held office from 1981 to 1989, the first president to serve two complete terms after World War Ⅱ. When he left, aged 77, he held the highest popularity rate of any retiring president in US history.
He remained positive even when he discovered he had an illness that would destroy him. “I will leave with the greatest love for this country of ours and eternal（永恒的optimism(乐观) for its future,”he wrote.Reagan can be best described as a man with ______.
| A．firmness | B．humour | C．optimism | D．talent |
What didn’t Reagan do in his life time?
| A．Playing the role of a bad guy. |
| B．Being a leading star of the film. |
| C．Saving people’s lives. |
| D．Working as a radio sports announcer. |
Which is the correct order of events described in the passage?
a. Reagan fought a losing battle against Alzheimer’s disease.
b. Reagan became an actor.
c. Reagan worked as a lifeguard.
d. Reagan graduated from college.
e. Reagan was elected the governor of California.
| A．a, c, d, e ,b | B．e, c, d, b, a |
| C．b, a, c, d, e | D．c, d, b, e, a |
When the writer of Reagan’s biography says “The world was a vast opportunity for him,” he really means that _______.
| A．Reagan achieved much in his whole life |
| B．Reagan could have done much better |
| C．Reagan did much for America and the world |
| D．Reagan was a very lucky man |
Television in the United States is free. To pay for programs, there are many advertisements. Often these advertisements are short plays with actors. The following television advertisement is like many others that Americans see daily.
We see a man and his wife at the breakfast table. They have been married for a long time. They are not speaking to each other. They haven't spoken to each other at the breakfast table for years. The husband is reading his newspaper. We can't see his face. The wife looks very bored as she pours a cup of coffee for him. Today, she is using a new kind of coffee for the first time. The husband picks up his cup. He isn't very interested. He tastes his coffee. Suddenly he puts down his newspaper. Something is different.! Can it be the coffee? He takes another taste. It's wonderful! He smiles. He looks at his wife and says in amazement,
"Doris, when did you cut your hair?"
Doris is pleased. She answers, "Two months ago."
Doris asks, "Herbie, when did your hair begin to turn gray?"
He replies, "A long time ago."
Doris says, "Oh, very handsome."
Now they aren't bored any more. Breakfast is different. Has a new kind of coffee changed their lives?In the television advertisement, Doris looks bored because ______.
| A．she doesn't like the breakfast that morning |
| B．she has been married to Herbie for a long time |
| C．Her husband doesn't care much for her |
| D．Herbie isn't interested in the breakfast she cooks |
The TV advertisement wants to tell the viewers ______. .
| A．to have an immediate try at the new coffee |
| B．to have a good laugh at the good couple |
| C．that a nice breakfast must go with nice coffee |
| D．that advertisements can certainly increase goods production |
What does the author mean by saying the last sentence?
| A．What kind of coffee can change people's lives? |
| B．How can a new kind of coffee change people's lives? |
| C．Nice coffee can change one's life. |
| D．A new kind of coffee costs quite a lot. |
This text is mainly about ______.
| A．who pays for TV programs in the United States |
| B．what a TV advertisement is usually like in the USA |
| C．why long married couples dislike speaking to each other |
| D．what made Herbie and Doris not bored any more |
The best way of learning a language is using it. The best way of learning English is talking in English as much as possible. Sometimes you'll get your words mixed up (混合) and people will not understand you. Sometimes people will say things too quickly and you can't understand them. But if you keep your sense of humor, you can always have a good laugh at the mistakes you make. Don't be unhappy if people seem to be laughing at your mistakes. It's better for people to laugh at your mistakes than to be angry with you, because they don't understand what you are saying. The most important thing for learning English is: "Don't be afraid of making mistakes because everyone makes mistakes." The writer thinks that the most important thing for you to learn a language is________.
| A．reading | B．practising | C．talking about it | D．listening |
If people laugh at the mistakes you make, you should ________.
| A．be angry with them | B．be angry with yourself |
| C．not care | D．believe you are right |
The story tells us " ________."
| A．It is normal (正常的) that we make some mistakes in learning English |
| B．Everyone must make mistakes |
| C．We can avoid making mistakes in learning a language |
| D．Laughing can help one learn English well |
Have you ever been afraid to talk back when you were treated unfairly? Have you ever bought something just because the salesman talked you into it? Many people are afraid to support themselves. Dr Robert Albert, author of Stand Up, Speak Out, and Talk Back thinks it' s because their self-respect is low. "There's always a' superior' around— a parent, a teacher, a boss— who knows better."
But Albert and other scientists are doing something to help people help themselves. They offer "assertiveness training" courses , A.T. for short. In the A.T. Course people learn that they have a right to be themselves. They learn to speak out and feel good about doing so. They learn to be aggressive without hurting other people.
In one way, learning to speak out is to get rid of fear. A group taking an A.T. Course will help the timid person to lose his fear. But A.T. uses an even stronger motive— he need to share. The timid person speaks out in the group because he wants to tell how he feels. Whether or not you speak up for yourself depends on your self-respect. If someone you face is more "important" than you, you may feel less of a person. You start to doubt your answers to problems. You can get to feel good about yourself. And once you do, you can learn to speak out.The problem the writer talks about is that ________.
| A．some people buy things they don't want |
| B．some people are afraid to speak out for their rights |
| C．there are too many superiors |
| D．some people don't think enough of themselves |
The cause of the problem talked about in this passage is that ________.
| A．some people have a low self-respect |
| B．there is always someone around who "knows better" |
| C．salesmen talk people into buying things they don't want |
| D．people don t share enough |
The A.T. Courses often ________.
A. make people distrust their own answers
B. make things more favorable for "superiors"
C. help people know as much as their "superiors"
D. help people become more importantA good title for this passage could be "________".
| A．The Need to Share | B．Talk Back When Necessary |
| C．One Way to Build Self-Respect | D．One Way to Train Speaking Ability |
Will it matter if you don't take your breakfast? Recently a test was given in the United States. Those tested included people of different ages, from 12 to 83. During the experiment, these people were given all kinds of breakfasts, and sometimes they got no breakfast at all. Special tests were set up to see how well their bodies worked when they had eaten a certain kind of breakfast. The results show that if a person eats a proper breakfast, he or she will work with better effect than if he or she has no breakfast. This fact appears to be especially true if a person works with his brains. If a student eats fruit, eggs, bread and milk before going to school, he will learn more quickly and listen with more attention to class.
Opposite to what many people believe, if you don't eat breakfast, you will not lose weight. This is because people become so hungry at noon that they eat too much for lunch, and end up gaining weight instead of losing. You will probably lose more weight if you reduce your other meals.During the test, those who were tested were given ________.
| A．no breakfast at all | B．very rich breakfast |
| C．little food for breakfast | D．different breakfast or none |
According to the passage, if a student does not eat breakfast, ________.
| A．he will fall ill |
| B．he will fail to listen to his teacher |
| C．he will not make progress in his studies |
| D．his mind will work more slowly |
The results of the test show that ________.
| A．breakfast has great effect on work and studies |
| B．breakfast has little to do with a person’s work |
| C．a person will work better if he has a simple breakfast |
| D．those working with brains should have much for breakfast |
Which of the following is NOT true according to the passage?
| A．Poor breakfasts affect those who work with brains. |
| B．Morning diet may cause one to get fatter. |
| C．Reducing lunch and supper is of less value in weight losing. |
| D．Eating less in lunch and supper may help to lose weight. |