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New research at Yale University has provided the strongest evidence that humans are evolving（进化）- and suggests that women of the future will be shorter, heavier, and healthier, and will have children for longer.
As medicine has allowed people who would previously have died young to live to childbearing age and beyond, many have assumed that natural selection no longer works on our species. But Prof Stephen Stearns, the evolutionary biologist at Yale University behind the study, says: "That's just plain false." While survival to reproductive age（生育年龄） is no longer such a barrier（障碍） for humans, other evolutionary pressures – including sexual selection and reproductive fitness – are still working away in full force. If the trends the research detected are representative and continue for another 10 generations, Prof Stearns says that the average woman in 2409AD will be 2cm shorter and 1kg heavier, will bear her first child five months earlier.
Prof Stearns and his team studied the medical histories of 14,000 residents of the Massachusetts town of Framingham, using medical data from a study going back to 1948 and spanning three generations. It looked at 2,238 women past reproductive age – so that they had had all the children they were going to – and tested their height, weight, cholesterol（胆固醇）, blood pressure, and other traits, to see if there was a correlation with the number of children they had borne. It found that shorter, heavier women had more children than lighter, taller ones. Women with lower blood pressure and cholesterol were also more likely to have large families. Women who gave birth early or had a late menopause were likely to have more children as well. More importantly, however, these traits were then passed on to their daughters, who also, on average, had more children.
The study has not determined why these factors are linked to reproductive success, but it is likely that they indicate genetic, rather than environmental, effects. Prof Stearns’ team controlled for other factors, including social and cultural change.
Research suggesting humans are evolving has been carried out before, but this is believed to be the first that directly compares reproductive success of individuals with physiological changes（生理变化）.
72. What is the main idea of the passage?
A. Natural selection no longer works on our species, especially the woman.
B. Woman of the future will be shorter, heavier, and healthier, and will have children for longer
C. Some genetic, rather than environmental effects has more influence on the evolvement of the humans.
D. Evolutionary pressures are still working in full force on the evolvement of the humans.
73. Which of the following statements is False about the women’s evolvement according to the research?
A. women will shorter
B. women will be fatter
C. The time for the women to have baby will be longer
D. women will be cleverer
74. Which factor is the most promising related to reproductive success?
A. Genetic B. Social C. Environmental D. Cultural
75. This passage may most likely be taken from .
A. a geography magazine
B. a medicine and technology research journal
C. a daily newspaper
D. an entertainment book
Without proper planning, tourism can cause problems. For example, too many tourists can crowd public places that are also enjoyed by the inhabitants of a country. If tourists create too much traffic, the inhabitants become annoyed and unhappy. They begin to dislike tourists and to treat them impolitely. They forget how much tourism can help the country’s economy. It is important to think about the people of a destination country and how tourism affects them. Tourism should help a country, keep the customs and beauty that attract tourists. Tourism should also advance the wealth and happiness of local inhabitants.
Too much tourism can be a problem. If tourism grows too quickly, people must leave other jobs to work in the tourism industry. This means that other parts of the country’s economy can suffer.
On the other hand, if there is not enough tourism, people can lose jobs. Businesses can also lose money. It costs a great deal of money to build large hotels, airports, air terminals, first- class roads, and other support facilities（配套设施）needed by tourist attractions. For example, a major international class tourism hotel can cost as much as 50 thousand dollars per room to build. If this room is not used most of the time, the owners of the hotel lose money.
Building a hotel is just a beginning. There must be many support facilities as well, including roads to get to the hotel, electricity, sewers to handle waste, and water. All of these support facilities cost money. If they are not used because there are not enough tourists , jobs and money are lost.
Which of the following do you think has been discussed in the part before this selection？
| A．It is extremely important to develop tourism. |
| B．Building roads and hotels is essential. |
| C．Support facilities are highly necessary. |
| D．Planning is of great importance to tourism. |
The underlined word“ inhabitants” （in Paragraph 1 ） probably means________.
| A．tourists | B．passengers |
| C．population | D．citizens |
Too much tourism can cause all these problems EXCEPT ________ .
| A．a bad effect on other industries |
| B．a change of tourists’ customs |
| C．over - crowdedness of places of interest |
| D．pressure on traffic |
It can be inferred from the text that ________ .
| A．the author doesn’t like tourism developing so fast |
| B．local people will benefit from tourist attraction |
| C．other parts of a country’s economy won’t benefit from tourism much |
| D．we can't build too many support facilities |
Many people believe the glare（炫目的光）from snow causes snowblindness. Yet, with dark glasses or not, they find themselves suffering from headaches and watering eyes, and even snowblindness ,when exposed to several hours of“ snow light”.
The United States army has now determined that glare from snow does not cause snowblindness in troops in a snow -covered country. Rather ,a man’s eyes frequently find nothing to focus on （聚集）in a broad space of snow- covered without- grass land. So his gaze continually moves and jumps back and forth over the entire landscape in search of something to look at. Finding something, hour after hour, the eyes never stop searching and the eyeballs become tired and the eye muscles ache. Nature makes up for this discomfort by producing more and more fluid （流体） which covers the eyeball. The fluid covers the eyeball in increasing quantity until it makes eyes difficult to see dearly, and the result is total, even though for a short time, snowblindness.
Experiments led the Army to a simple method of overcoming this problem. Scouts（侦察兵）ahead of the troops are trained to shake snow from evergreen bushes, creating a dotted line as they cross completely snow - covered landscape. Even the scouts themselves throw lightweight, dark - colored objects ahead on which they can focus too. The men following can then see something. Their gaze is arrested. Their eyes focus on a bush and having found something to see, stop searching the snow -blanketed landscape. By focusing their attention on one object at a time. the men can cross the snow without becoming hopelessly snowblind or lost. In this way the problem of crossing a continuous white land is overcome.To prevent snowblindness caused by the strong light from snow, wearing glasses or not ________.
| A．depends on whether the snow is white enough |
| B．makes no difference |
| C．makes much difference |
| D．depends on whether the snow is thick |
When the eyes are tired, tears flow out ________.
| A．to clear the vision |
| B．to make the eyes stop searching |
| C．to make the vision unclear |
| D．to produce more and more liquid |
Snowblindness can be avoided ________.
| A．by moving one’s gaze back and forth |
| B．by walking ahead and keeping looking around |
| C．by making up for the discomfort of one’s eyes |
| D．by providing the eyes with something to focus on |
The dream of flying into outer space, cherished by the Chinese people for centuries, will soon come true.
China launched its fourth unmanned spacecraft （飞船）“Shenzhou Ⅳ” on December 30 at the Jiuquan Satellite Launch Centre in Gansu Province. It was the 27th consecutive（连续的）and successful launch of China - made rockets since October 1996. This launch has made it more realistic for China to send a person into space on its own following Russia and the USA.
Qi Faren，leading designer of the spacecraft system, said all the functions （功能） designed for manned flights have withstood （经受住）the test of three previous, successful launches and return landings of the “Shenzhou” spaceships.
China launched the “Shenzhou Ⅰ ”, “Shenzhou Ⅱ ”and “Shenzhou Ⅲ ”spacecrafts in 1999,2001 and 2002 respectively.
“Shouzhou Ⅳ” was to make it a more comfortable place in which astronauts can live and work. All parts of the application system for manned flight are aboard the “Shenzhou Ⅳ”craft in all test flights.
China’s manned flight programme began in 1992. A number of unmanned test flights will be launched before Chinese astronauts are sent into space.
Leading scientists in charge of China’s manned space programme said the successful launch of the “Shenzhou Ⅳ” laid a solid foundation for the country’s future task of sending Chinese astronauts to outer space.
The spacecraft returned to the earth on January 5, after completing seven experiments in space.
Officials at the centre said that“ Shenzhou Ⅴ”, a manned spacecraft, is expected to be launched later this year.
How many countries can send a person into space on its own by now？
| A．2. | B．3. |
| C．4. | D．Not mentioned. |
China’s manned flight programme began in ________.
| A．1992 | B．October 1996. |
| C．1999 | D．January 2003 |
As a matter of fact, ________ .
| A．“Shenzhou Ⅴ ”has been launched |
| B．“Shenzhou Ⅳ” was a manned spacecraft |
| C．“Shenzhou Ⅲ ”and“ Shenzhou Ⅳ” were not launched in the same year |
| D．the dream of man flying into outer space has come true in China |
Which is the most suitable title for the passage?
| A．The Successful Launching of “Shenzhou Ⅳ ”. |
| B．The Landing of “Shenzhou Ⅳ ”. |
| C．Chin a’s Manned Flight Programme. |
| D．The Third Country Sending a Person into Outer Space. |
Life on land probably began about 430 million years ago, though it has existed in the water for perhaps as much as 3,000 million years. When we think of the first thing on land, we probably think of strange animals coming out of the oceans, but in fact no animals could have been living if plants had not been on land first. Plants had to be on land before animals arrived. They supplied the first land animals with the surrounding and food necessity, since they, the plants, are the only form of life that is able to get and store energy.
The first plants to exist out of the water were probably certain kinds of algae（海藻）which were followed by other plants that grew close to the ground and needed water in which to reproduce. Once the move to land had been made, however, evolution（进化）took place quickly. By the end of 100 million years, plants had developed their roots（根）,and some had got tree -like forms since height was very important in gaining sunlight. About 300 million years ago, much of the world was covered with forests of huge trees. In most ways they were like modern trees. They had roots, leaves, wood, but mostly they had not developed seeds.
The main idea of the first paragraph is ________.
| A．life on land probably began 430 years ago |
| B．the first animal on land came from oceans |
| C．there wouldn't be animals without plants |
| D．plants are the only form of life that is able to get and store energy |
Which of the following statements is true according to the passage?
| A．Algae has existed for more than 430 million years. |
| B．It is impossible that algae might be the earliest plant on land. |
| C．Plants get food from animals in the oceans. |
| D．Evolution began after animals appeared on land. |
Plants with roots appeared about ________ million years ago.
| A．430 | B．300 | C．330 | D．100 |
According to the passage, ________ appeared earlier than ________.
| A．apples; oranges | B．oranges; apples |
| C．oranges; roses | D．algae; wheat |
Some time ago ,I discovered that one of my chairs had a broken leg. I didn’t think there would be any difficulty in getting it mended ,as there are a whole lot of antique（古董）shops near my home. So I left home one morning carrying the chair with me. I went into the first shop expecting a friendly reception（接待）. I was quite wrong. The man wouldn't oven look at my chair.
The second shop, though slightly more polite, was just the same, and the third and the fourth - so I decided that my approach must be wrong.
I went into the fifth shop with a plan in my mind. I placed the chair on the floor and said to the shopkeeper,“ Would you like to buy a chair?” He looked it over carefully and said,“ Yes, not a bad chair. How much do you want for it, sir?” “Twenty pounds,”I said. “OK, ”he said, “I’ll give you twenty pounds. ”“It ‘s got a slightly broken leg,”I said. “Yes, I saw that, it's nothing.”
Everything was going according to plan and I was getting excited. “What will you do with it?”I asked. “Oh, it will be easy to sell once the repair is done. ”“I'll buy it,”I said. “What do you mean？You’ve just sold it to me,”he said. “Yes, I know but I’ve changed my mind. I'm sorry, I'll give you twenty -seven pounds for it. ”“ Your must be crazy, ”he said. Then, suddenly the penny dropped. “I know what you want. You want me to repair your chair. ”“ You’re right, ”I said. “And what would you have done if I had walked in and said,’Would you mend this chair for me I wouldn't have agreed to do it,” he said. “We don’t do repairs, not enough money in it and too much trouble. But I’ll mend this for you, shall we say for a fiver?”He was a very nice man and was greatly amused（感到有趣）by the whole thing.
We can learn from the text that in the first shop the writer ________.
| A．was rather impolite |
| B．was warmly received |
| C．asked the shopkeeper to buy his chair |
| D．asked the shopkeeper to repair his chair |
The expression “the penny dropped” in the last paragraph means the shopkeeper ________.
| A．changed his mind | B．accepted the offer |
| C．saw the writer’s purpose | D．decided to help the writer |
How much did the writer pay?
| A．￡ 5. | B．￡ 7. | C．￡ 20. | D．￡ 27. |
From the text, we can learn that the writer was ________
| A．hanest | B．careful | C．smart | D．funny |