The key to reaching or staying at a healthy weight is regular exercise and good eating habits. Teens should get 60 minutes or more of physical activity a day. Note the word “activity . As long as you 题目和参考答案——青夏教育精英家教网—

题目内容

The key to reaching or staying at a healthy weight is regular exercise and good eating habits. Teens should get 60 minutes or more of physical activity a day. Note the word “activity”. As long as you’re getting your body moving, it doesn’t have to mean doing complicated exercises or going to the gym (体育馆) every day. All that matters is that each week you get the right balance of activity, including aerobic (有氧健身法的) strength building, and flexibility (柔韧性) exercise. Make exercise a habit by scheduling some every day.

On days when you have soccer practice or an aerobics class, you may have no trouble exercising for an hour or more. But most of us are busy, and 60 minutes a day of activity seems like a lot of time. The good news is that it’s OK to divide it into shorter “exercise breaks” throughout the day. Just as you might have a healthy snack to stop yourself getting hungry, exercise snacks can keep energy level high. So get up 15 minutes earlier and do some yoga or other stretching (伸展) activity. Fast walk or jog (慢跑) for 15 minutes at lunch. Do the same thing after school or walk or bike home. Add to that taking the stairs, gym class, and walking between classes during the day, and you’ve probably reached your 60 minutes.

Here are 5 simple ways to make an exercise lifestyle change:

1. Start today. Go outside for a walk.

2. Take the stairs instead of the elevator.

3. Instead of driving, walk or bike to places like school or a friend’s house.

4. Clean your room or wash the car.

5. Limit your time watching TV, using the computer, or playing video games--and when you do play, try some games that get you moving.

1. The underlined phrase “exercise snacks” in the second paragraph probably means ________.

A. food eaten before exercise

B. food eaten during exercise

C. shorter “exercise breaks”

D. a new kind of exercise

2.Why should we have exercise snacks every day?

A .Because they can stop us getting hungry

B. Because they can keep energy level high

C. Because they can include many kinds of sports

D. Because they are more likely to relate to our daily life

3.Which of the following is NOT mentioned in the passage?

A. To go hiking on your holidays

B. To spend less time on computer games

C. To go to school on foot or by bike

D. To do some housework at home

4.What will be most probably discussed in the following paragraph?

A. Losing weight B. Good eating habits C. Exercising your brain D. Outdoors exercise

5. What would be the best title for this passage?

A. Regular exercise B. School exercise C. Indoors exercise D. Difficult exercises

【答案】

1.C

2.B

3.A

4.B

5.A

【解析】略

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WASHINGTON—Two-thirds of the world’s polar bear population could be gone by 2050 if predictions of melting sea ice hold true, the US Geological Survey reported on Friday.

The fate of polar bears could be even worse than that estimate, because sea ice in the Arctic might be disappearing faster than the available computer models predict, the geological survey said in a report aimed at determining whether the big white bear should be listed as a threatened species.

“There is a definite link between changes in the sea ice and the welfare of polar bears,” said Steve Amstrup, who led the research team. He says Arctic sea ice is already at the lowest this year and is expected to retreat(退却) farther this month.

That means that polar bears—some 16,000 of them -- will disappear by 2050 from parts of the Arctic where sea ice is melting most rapidly, along the north coasts of Alaska and Russia, researchers said in a telephone briefing(简报).

Other polar bears could survive beyond that date but many of those could be gone by 2100, Amstrup said. By this century’s end, the only polar bears left might live in the Canadian Arctic islands and along the west coast of Greenland.

“It is likely to result in loss of approximately two-thirds of the world’s current polar bear population by the mid 21st century,” the report’s executive summary said.

“Because the observed trajectory(轨迹)of Arctic sea ice decline appears to be underestimated by currently available models, this assessment of future polar bear status may be conservative(保守的).”

In January, the US Fish and Wildlife Service proposed listing the polar bear as a threatened species, noting polar bears depend on sea ice as a platform to hunt seals, their main food.

Without enough sea ice, polar bears would be forced onto land, but they are poor hunters once they get out of the water and ice, the researchers said. The bears’ disappearance would probably take place as young cubs(幼兽)failed to survive to adulthood and females were unable to reproduce successfully.

1.What was the US Geological Survey intended to do?

A. To determine whether the polar bear was in danger.

B. To measure how fast the sea ice melts in the Arctic.

C. To check the predictions of the computer models.

D. To find out the exact number of the polar bear.

2.What causes the polar bears to disappear by 2050?

A. The pollution of the Arctic region. B. The sea ice melting at high speed

C. Fewer food sources being left. D. The temperature getting colder.

3.The key to preventing polar bears dying out seems to _______________.

A. help young polar bears to survive the cold winter

B. have large number of seals living in the oceans

C. make sure there is enough sea ice in the Arctic

D. provide chances for adult polar bears to reproduce

阅读下面短文并回答问题，然后将答案写到相应的位置上（请注意问题后的字数要求）

〔1〕There are many useful suggestions and pieces of advice that can help one to improve English. Here are some useful suggestions and new tips to increase one’s English language vocabulary.

〔2〕Learning English vocabulary is about much more than just learning the right words. A broad grasp of vocabulary in the English language is based on understanding important expressions and “word combinations”, which means groups of words that often or always go together.

〔3〕Learning a word will not help very much if you quickly forget it. Research shows that it takes from 10 to 20 repetitions to really make a word part of your vocabulary. Since most words are learned from how they are used in context （上下文）, the more words one is exposed to（接触）, ________. Keep a writing pad close to you. When you read, pay close attention to the word you do not know, write the word down and try to guess its meaning from the context. Then look up the word in a dictionary.

〔4〕Remember that if you do not use English words that you have just learned in conversation or writing, you will forget them very quickly. So the best way to learn new words effectively is just by trying to use them in conversation and writing. Remember also that practice is the key to fluent spoken English.

〔5〕Building vocabulary is a life-long task. Remember, “In the beginning was the word.” Your future could depend on how rich your vocabulary is. It will also determine the quality of your communication.

1.What is the main idea of the text? (No more than 10 words)

____________________________________________

2.Complete the following statement with proper words. (No more than 5 words)

If you want to learn new words effectively, the best way is using them ________.

3.Fill in the blank in Paragraph 3 with proper words. (No more than 10 words)

____________________________________________________________

4.Why does the author think context is important in learning English? (no more than 15 words)

___________________________________ _________________________

5.What does the word “It” (Line 2, Paragraph 5) probably refer to? (No more than 7 words)

___________________________________________________________________________

根据对话内容，从对话后的选项中选出能填入空白处的最佳选项。并在答题卡上将该项涂黑。选项中有两项为多余选项。

W: Hi, John.

M: Hi. Lucy. 1

W: Yes. I'm required to tell a story in English before the lesson begins.

M: Oh, I see. 2

W: You're right. I need to practice on the stage before they all come.

M: 3

W: Yes, here, in my pocket...Oops, where is it?

M: Don't worry, 4

W: ...No, not in the bag either. I'm afraid I left it at home.

M: 5

W: Aha! It's just the key to the classroom! Thank you so much.

A．Glad to see you.

B．What's the story about?

C．What's that around your neck?

D．Maybe you put it in your schoolbag,

E. Do you have the key to the classroom?

F. You're going to school rather early today.

G. So you want to get to the classroom earlier to make some preparations?

People have wondered for a long time how their personalities and behaviors are formed．It is not easy to explain why one person is intelligent and another is not, or why one is cooperative （合作的）and another is competitive．

Social scientists are, of course, extremely interested in these types of questions．They want to explain why we possess certain characteristics and exhibit certain behaviors．There are no clear answers yet, but two distinct schools of thought （学派）on the matter have developed．As one might expect, the two approaches are very different from one another, and there is a great deal of debate between proponents of each theory．The controversy（argument) is often referred to as “nature and nurture（教育）”．

Those who support the “nature” side of the conflict believe that our personalities and behavior patterns are largely determined by biological and genetic factors．That our environment has little, if anything, to do with our abilities, characteristics, and behavior is central to this theory．Taken to an extreme(走极端）, this theory maintains that our behavior is predetermined to such a degree that we are almost completely governed by our instincts（本能）．

Proponents of the “nurture” theory, or, as they are often called, behaviorists, claimed that our environment is more important than our biologically based instincts in determining how we will act．A behaviorist, B．F．Skinner, sees humans as beings whose behavior is almost completely shaped by their surroundings．The behaviorists’ view of the human being is quite mechanistic（机械论的）; they maintain that, like machines, humans’ respond to environmental stimuli（刺激） as the basis of their behavior．

Socially and politically, the consequences of these two theories are far-reaching．In the US, for example, blacks often score below whites on standardized intelligence tests．This leads some proponents to conclude that blacks are genetically lower in status than whites．Behaviorists, on the contrary, say that the differences in scores are due to the fact that blacks are often robbed of many of the educational and other environmental advantages that whites enjoy, and that, as a result, they do not develop the same responses that whites do．

Either of these theories cannot yet fully explain human behavior．In fact, it is quite likely that the key to our behavior lies somewhere between these two extremes. That the controversy will continue for a long time is certain．

1.This passage is mainly concerned with ．

A．relation between personality and behavior

B．relation between behavior and environment

C．different accounts of patterns of human behavior

D．different theories of the formation of human behavior

2.The underlined word " proponents'' in paragraph 2 means ．

A．creators	B．advisors
C．supporters	D．judges

3.In paragraph 5 , the author mainly writes about ．

A．the considerable（值得考虑的） influence of the two theories

B．differences between the blacks and whites

C．racial discrimination in the United States

D．different responds to intelligence tests

4.What's the author's purpose in writing the passage?

A．To call our attention to the changes of human behavior．

B．To urge scientists to do more research in social science．

C．To give us a detailed explanation of human behavior．

D．To present an argument in the field of social science．

---You may find the key to the maths problem on page 107 .

---Ah, it’s so simple . I wonder why I of that .

A. hadn’t thought B. haven’t thought

C. didn’t think D. wasn’t thinking

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