Things are getting worse than before. Not only polluted, but also crowded. [ ] A．is the city; are all the streets B．the city is; are all the streets C．is the city; all the streets are D．the city i 题目和参考答案——青夏教育精英家教网—

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Things are getting worse than before. Not only______ polluted, but ________ also crowded.

[　　]

A．is the city; are all the streets

B．the city is; are all the streets

C．is the city; all the streets are

D．the city is; the streets are

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The two things are the same in outward form but different ________.
A. in addition B. in brief C. in common D. in essence

We are living in an age ______ many things are done on computer.

A. which B. that C. whose D. when

When prehistoric man arrived in new parts of the world, something strong happened to the large animals; they suddenly became extinct. Smaller species survived; the large, slow-growing animals were easy game, and were quickly hunted to extinction.

Now something similar could be happening in the oceans. That the seas are being over-fished has been known for years and researchers such as Ransom Myers and Boris Worm have shown how fast things are changing. They have looked at half a century of data from fisheries around the world. Their methods do not attempt to estimate the actual biomass (the amount of living biological matter) of fish species in particular parts of the ocean, but rather changes in that biomass over time. According to their latest paper published in Nature, the biomass of large predators (animals that kill and eat other animals) inanes fishery is reduced on average by 80% within 15 years of the start of exploitation. In some long-fished areas, it has halved again since then.

Dr. Worm acknowledges that these figures are conservative (保守的). One reason for this is that fishing technology has improved. Today’s vessels can find their prey using satellites and sonar, which were not available 50 years ago. That means a higher proportion of what is in the sea is being caught, so the real difference between present and past is likely to be worse than the one recorded by changes in catch sizes. In the early days, too, longlines would have been more saturated with fish. Some individuals would therefore not have been caught, since baited hooks would have been available to trap them, leading to an underestimate of fish stocks in the past. Furthermore, in the early days of longline fishing, a lot of fish were lost to sharks after they had been hooked. That is no longer a problem, because there are fewer sharks around noise.

Dr. Myers and Dr. Worm argue that their work gives a correct baseline, which future management efforts must take into account. They believe the date support an idea current among marine biologists, that of the “shifting baseline”. The notion is that people have failed to detect the massive changes which have happened in the ocean because they have been looking back only a relatively short time into the past. That matters because theory suggests that the maximum sustainable yield that can be cropped from a fishery comes when the biomass of a target species is about 50% of its original levels. Most fisheries are well below that, which is a bad way to do business.

1.The aim of the extinction of large prehistoric animals is to suggest that _______.

A．large animal were not easy to survive in the changing environment

B．small species survived as large animals disappeared

C．large sea animals may face the same threat today.

D．Slow-growing fish outlive fast-growing ones

2.We can infer from Dr Myers and Dr. Worm’s paper that _______.

A．the stock of large predators in some old fisheries has reduced by 90%

B．there are only half as many fisheries are there were 15 years ago

C．the catch sizes in new fisheries are only 20% of the original amount

D．the number of larger predators dropped faster in new fisheries than in the old

3.By saying these figures are conservative (line 1, paragraph 3), Dr worm means that_______.

A．fishing technology has improved rapidly

B．then catch-sizes are actually smaller then recorded

C．the marine biomass has suffered a greater loss

D．the date collected so far are out of date.

4.Dr Myers and other researchers hold that _______.

A．people should look for a baseline that can’t work for a longer time

B．fisheries should keep the yield below 50% of the biomass

C．the ocean biomass should restore its original level.

D．people should adjust the fishing baseline to changing situation.

5.The author seems to be mainly concerned with most fisheries’ _______.

A．management efficiency

B．biomass level

C．catch-size limits

D．technological application.

Books which give instructions on how to do things are very popular in the United States today. Thousands of these "How to" books are available; in fact, there are about four thousand books with titles that begin with the words "How to" One book may tell you how to earn more money, another may tell you how to save or spend it, and another may explain how to give your money away. Many "How to" books give advice on careers (职业). They tell you how to choose a career and how to succeed at it. If you fail, however, you can buy a book called “How to Turn Failure into Success”. If you would like to become very rich, you can buy the book “How to Make a Million”. If you never make any money at all, you may need a book called "How to" Live on Nothing? One of the most popular types of books is one that helps you with personal problems. If you want to have a better love of life, you can read "How to" Succeed at Love Every Minute of Your Life.? If you are tired of books on happiness, you may prefer a book called "How to". Make Yourself miserable?

Many of these books help people use their time better. Some people want books which will give them useful information about sports, hobbies, and travel. Other people use their free time to make repairs and improvements on their homes. They prefer books which give step by step instruction on how to repair things like plumbing (卫生管道工程) and electrical wiring, or on how to redecorate (重新装饰) or enlarge a house.

Why have "How to" books become so popular? Probably because life has become so complex. Today people have far more free time to use, more choices to make, and more problems to solve. "How to" books help people deal with modern life.

1.These "How to" books are written to______.

A．tell people to love their life

B．earn money

C．give people some good advice on how to do something they want to do

D．say something about America

2.Before someone wants to find a good job. He had better______.

A．buy a book on "How to" Make a Million?

B．read a book on how to choose a career and how to succeed at it

C．beg bosses or managers for it

D．use his free time to look for it

3.If people will not succeed in what he is doing a book called________ can give help.

A．＂How to" Turn Failure into Success？

B．"How to" Make a Million?

C．"How to" Succeed at Love Every Minute of Your Life?

D．"How to" Make Yourself Miserable?

4.Which headline of the following is the best for this passage?

A．“How to" Books in America

B．"How to" Books Are Ordinary in America

C．Thousands of "How to" Books

D．Books with Title That Begin with the Words "How to"

Long bus rides are like television shows. They have a beginning, a middle, and an end with commercials (商业广告) thrown in every three or four minutes. The commercials are unavoidable. They happen whether you want them or not. Every couple of minutes a billboard glides by outside the bus window. “Buy Super Clean Toothpaste.” “Drink Good Wet Root Beer.” “Fill up with Pacific Gas. “Only when you have fallen asleep, which is equal to turning the television set off, can you get separated from the unending cry of “You Need It! Buy It Now!”

As for the ride itself, the beginning of it is comfortable and somewhat exciting, even if you’ve traveled that way before. Usually some things are keeping changing out of the windows — various houses, crop fields, attractive bridges, … and sometimes even a small accident. Your bus driver may have a unique style of driving and it’s fun trying experience it the first hour or so. If the driver is particularly reckless (鲁莽的) or daring, the ride can be as thrilling (惊心动魄的) as an adventurous story. Will the driver pass the truck in time? Will the driver move into the right or the left hand lane? After a while, of course, the excitement dies down. Sleeping for a while helps pass the middle hours of the ride. Food always makes bus rides more interesting. But you’ve got to be careful of what kind of food you eat. Too much salty food can make you very thirsty between stops.

The end of the ride is somewhat like the beginning. You know the riding will soon be over and there’s a kind of expectation and excitement with that. The seat, of course, has become harder for the hours having passed. By now you may sit with your legs crossed, or with your hands in your lap, or with your hands on the arms, or even with your hands crossed behind your head. That is to say that the end comes just at no more ways to sit.

1.According to the passage, what do the passengers usually see when they are on a long bus trip?

A．Buses on the road. B．Films on television.

C．Advertisements on the billboards. D．Gas stations.

2.What is the purpose of this passage?

A．To give the writer’s opinion about long bus trips.

B．To persuade you to take some long bus riding.

C．To explain how bus trips and television shows differ.

D．To describe the billboards along the road.

3.The writer of this passage would probably prefer ______.

A．those reckless bus drivers

B．driving with no one around

C．a television set on the bus

D．no billboards along the road

4.The writer feels long bus rides are like TV shows because ______.

A．the commercials both on TV shows and on billboards along the road are fun

B．they both have a beginning, a middle and an end, with commercials in between

C．the drivers are always reckless on TV shows just as they are on buses

D．both traveling by bus itself and watching TV programs on bus are not exciting.

5.The writer thinks that the end of the ride is somewhat like the beginning because both are .

A．exciting B．comfortable C．tiring D．boring

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