The experiment needs fifty people divided into two groups of the same size． Group A is to take part in a 7-week exercise, while Group B is not allowed to do any exercise during those seven weeks． On the day before the experiment began, all fifty men took part in a step-test． They were told to step up and down on a 16-inch-long bench at 30 steps a minute for five minutes． After the test each man’s heart-beating was taken and recorded． Then during the seven weeks men in Group A rode a sort of bike-like exercise machine for 15 minutes a day． During the first day ride they were asked to ride very slowly． For the next three days, they were permitted to ride a bit more quickly． And the speed of riding was increased every few days until the end of the experiment, when both Group A and Group B were given the step-test again and the heart-beating was taken again, too． Heart-beating of Group A members was to have dropped to an average of 30 heart beats per minute while that of Group B members remained the same or almost unchanged．

1． How many people were in each group?

A． 100 B． 50 C．25 D． 15

2． The step-test was given ______．

A． after each exercise period

B． only once, at the beginning of the seven-week period

C． at the beginning and at the end of the seven-week period

D． twice to the men in Group A and once to the men in Group B

3． The exercise was planned so that the amount of quick riding _________．

A． increased every few days　　 B． changed every other day

C． increased every other day　　 D． increased every exercise period

4． What did Group A do in their experiment? They ______ ．

A． stepped up and down on a bench each day

B． pushed and pulled the bikes every day

C． were prevented from doing any exercise

D． rode on an exercise machine

5． It seemed that _______ during the whole experiment．

A． Group A did less exercise than Group B

B． Group B did less exercise than Group A　　

C． Group A did everything

D． Group B did nothing

　　What comes into your mind when you think about robots? Do you imagine armies of evil metal monsters planning to take over the world? Or, perhaps of mechanical men who have been created as guards or soldiers by a mad genius? Or maybe you think of man- like robots who act, think, and look like human beings. In fact robots like these have more to do with science fiction films than with real life. In the real world robots are machines that do jobs which otherwise have to be done by people. Robots either operate by themselves or under the control of a person.
　　In a car factory, for example, robot machinery can put together and paint car bodies. On the sea bed remotecontrolled（遥控）underwater machines with mechanical arms can perform tasks too difficult for divers. Robot spacecraft can explore the solar system and send back information about planets and stars.
　　Many robots have computer brains. Some robots are fitted with cameras , sensors, and microphones which enable them to see, to feel, and to hear. And some robots can even produce electronic speech.
　　All this does not mean that a robot can think and behave like a human being. Present day robots have to be programmed with a good deal of information before they can carry out even simple tasks.
　44．Robots in real life________.
　　A. can behave like human beings   B. have the ability to control the world
　　C. can think by themselves        D. can help us with a lot of work
　45．According to this article, which of the following is not true about robots in the real world?
　　A. Some robots are as creative as artists.     B. Some robots can help manufacture cars.
　　C. Some robots can see and hear.       D. Some robots can explore outer space.
　46．Robots can perform many tasks for man because________.
　　A. they have intelligence    B. they are supplied with computer programs
　　C. they can imitate human beings    D. they have the ability to learn new things
　47．The robots in science fiction films and those in real life differ mainly in________.
　　A. mentality　　 B. appearance　　 C. material　　　 D. size

A desert is a beautiful land of silence and space. The sun shines, the wind blows, and time and space seem endless. Nothing is soft. The sand and rocks are hard, and many of the plants even have hard needles instead of leaves.

The size and location(分布) of the world’s deserts are always changing. Over millions of years, as climates change and mountains rise, new dry and wet areas develop. But within the last 100 yeas, deserts have been growing at a frightening speed. This is partly because of natural changes, but the greatest makers are humans.

Humans can make deserts, but humans can also prevent their growth. Algeria Mauritania is planting a similar wall around Nouakchott, the capital. Iran puts a thin covering of petroleum(石油) on sandy areas and plants trees. The oil keeps the water and small trees in the land, and men on motorcycles(摩托车) keep the sheep and goats away. The USSR and India are building long canals to bring water to desert areas.

In this passage, “needles” refers to _______.

A. small, thin pieces of steel.

B. long, thin pieces of branches.

C. small pointed growth on the stem(茎) of a plant.

D. small, thin pieces of sticks.

Which of the following is NOT true?

A. The greatest desert makers are humans.

B. There aren’t any living things in the deserts.

C. Deserts have been growing quickly.

D. The size of the deserts is always changing.

People in some countries are fighting a battle against _______.

A. the growth of deserts B. the disappearance of desert plants

C. natural changes  D. congenital climate

We can guess that Mauritania and Algeria belong to _______.

A. Asian countries 　　　　       B. American countries

C. European counties　　　 D. African countries

Choose the sentence which best gives the main idea of the passage.

A. The deserts of the world are always changing.

B. Man is to take measures to control the growth of the world’s deserts.

C. Deserts are lands of silence and space.

D. Deserts have grown at a fast pace in the past 10 years.

PALO ALTO, California------"Switching off the television may help prevent children from getting fatter------ even if they do not change their diet or increase the amount they exercise," US researchers said last week.

　　A study of 192 third and fourth graders, generally aged eight and nine, found that children who cut the number of hours spent watching television gained nearly two pounds(0.9kg) less over a one-year period than those who did not change their television diet.

　　"The findings are important because they show that weight loss can only be the result of a reduction in television viewing and not any other activity," said Thomas Robinson, a pediatrician(儿科专家) at Stanford University.

　　"American children spend an average of more than four hours per day watching television and videos or playing video games, and rates of childhood being very fat have doubled over the past 20 years," Robinson said.

　　In the study, presented this week to the Pediatric Academic Societies‘ annual meeting in San Francisco, the researchers persuaded about 100 of the students to reduce their television viewing by one-quarter to one-third.

　　Children watching fewer hours of television showed a significantly smaller increase in waist size and had less body fat than other students who continued their normal television viewing, even though neither group ate a special diet or took part in any extra exercise.

　　"One explanation for the weight loss could be the children unstuck to the television may simply have been moving around more and burning off calories," Robinson said.

　　"Another reason might be due to eating fewer meals in front of the television. Some studies have suggested that eating in front of the TV encourages people to eat more," Robinson said.

1.The author tries to tell us in the first two paragraphs that ________.

2.According to the passage, the time American children usually spend on watching TV_____.

3. The time children spend on TV viewing every day is suggested to be about ________.

4.Which one of the following is right?

5.Why can watching TV increase kids’ weight according to the passage?

　　A. They usually eat more while watching TV.

　　B. They burn off fewer calories.

　　C. They change their diet while watching TV.

D. Both A and B.

阅读下面短文，从短文后所给各题的四个选项（A、B、C、D）中选出能填入空白处的最佳选项。

Don’t Take the Fun Out of Youth Sports

When I joined a private football league a few years ago, the sport meant everything to me. My coach said that I had lots of potential, and I became captain of my  1  . That was before all the fun was taken out of   2  .

At first, everyone on the team got   3   playing time. Then the team moved up to the top division after winning all its games, and the   4  started. Some parents, who had paid the coach extra so their daughters could have   5  one on one training, got angry when she didn’t give them more playing time in our   6  . The coach was replaced.

The new coach, however, took all the fun out of the game: All we did during practice was 7  . I always wished to God that it would rain so we would not have the   8  .Of course, all teams run drills; they are  9  . But we ran so much that, afterwards, we had trouble   10  . Younger people shouldn’t be doing exercises   11  for 18-year-olds.

I was very thin   12  I started football, but as a member of this team I wouldn’t eat much, because I was afraid of being too  13  to run. I feared making mistakes, and the added pressure caused me to make more than my usual  14  .

Is all this pressure necessary? I  15   up leaving the football team. Four other girls did the same, and two of them stopped playing football completely. That’s  16  , because they had so much potential. They were just burned out with all the pressure they   17  from the coach or their parents.

I continued playing football at school and   18  my love for it. I joined a private team coached by my school coach. When I started playing   19  him, he told me I needed to relax because I looked nervous. After I   20  down, I played better. When you enjoy something, it’s a lot easier to do it well.

1.A.class　　　　　　　　　　  B.club　　　　　　　　   C.team　　　　　　　　  D.board

2.A.playing　　　　　　　　   B.living　　　　　　　　  C.learning　　　　　　  D.working

3.A.great　　　　　　　　　　  B.equal　　　　　　　　  C.right　　　　　　　　  D.extra

4.A.business　　　　　　　　 B.struggle　　　　　　  C.attempt　　　　　　　　　　 D.pressure

5.A.free　　　　　　　　　　    B.private　　　　　　    C.good　　　　　　　　  D.basic

6.A.matches　　　　　　　　 B.courses　　　　　　　　　　 C.lessons　　　　　　   D.programs

7.A.jump　　　　　　　　　　  B.play　　　　　　　　   C.run　　　　　　　　    D.shoot

8.A.duty　　　　　　　　　　   B.meeting　　　　　　  C.operation　　　　    D.training

9.A.necessary　　　　　　   B.boring &n
?

bsp;　　　　　　  C.scientific　　　　    D.practical

10.A.speaking　　　　　　   B.moving　　　　　　   C.sleeping　　　　　　  D.breathing

11.A.used　　　　　　　　　　 B.intended　　　　　　 C.made　　　　　　　　 D.described

12.A.till　　　　　　　　　　    B.since　　　　　　　　  C.before　　　　　　    D.because

13.A.full　　　　　　　　　　   B.tired　　　　　　　　   C.lazy　　　　　　　　   D.big

14.A.size　　　　　　　　　　  B.share　　　　　　　　  C.space　　　　　　　　 D.state

15.A.gave　　　　　　　　　　 B.kept　　　　　　　　   C.ended　　　　　　　　 D.picked

16.A.sad　　　　　　　　　　   B.shameful　　　　    C.silly　　　　　　　　   D.serious

17.A.received　　　　　　    B.suffered　　　　　　 C.brought　　　　　　  D.felt

18.A.reconsidered　　　　 B.rediscovered　　   C.re-formed　　　　   D.replaced

19.A.at　　　　　　　　　　　　 B.by　　　　　　　　　　  C.for　　　　　　　　　　 D.around

20.A.fell　　　　　　　　　　   B.stepped　　　　　　　　　　 C.slowed　　　　　　   D.calmed