We know that many animals do not stay in one place. Bird, fish and other animals move from one
place to another at a certain time. They move for different reasons: most of them move to find food more
easily, but others move to get away from places that are too crowded.
     When cold weather comes, many birds move to warmer places to find food. Some fishes give birth in warm water and move to cold water to feed. The most famous migration (迁移) is probably the migration of the fish, which is called "salmon". This fish is born in fresh water but it travels many miles to salt water.
There it spends its life. When it is old, it returns to its birthplace in fresh water. Then it gives birth and dies
there. In northern Europe, there is a kind of mouse. They leave their mountain homes when they become
too crowded. They move down to the low land. Sometimes they move all the way to the seaside, and
many of them are killed when they fall into the sea.
     Recently, scientists have studied the migration of a kind of lobster (龙虾). Every year, when the
season of bad weather arrives, the lobsters get into a long line and start to walk across the floor of the
ocean. Nobody knows why they do this, and nobody knows where they go.
So, sometimes we know why humans and animals move from one place to another, but at other times
we don't. Maybe living things just like to travel.

1. Most animals move from one place to another at a certain time to _________.

A. give birth
B. enjoy warmer weather
C. find food more easily
D. find beautiful places

2. The fish called "salmon" spends a long life in _________.

A. salt water
B. rivers  
C. fresh water
D. its birthplace

3. What is the main idea of the passage?

A. Animals move in order to find food more easily.
B. The migration of the fish called "salmon" is the most famous migration.
C. Living things move from one place to another because they like to travel.
D. sometimes we know why and how living things move from one place to another,
     but sometimes we don't.

     I heard many parents complaining that their teenage children are rebelling. I wish it were so. At your
age you ought to be growing away from your parents. You should be learning to stand on your own two
feet. But take a good look at the present rebellion. It seems that teenagers are taking the same way of
showing that they disagree with their parents. Instead of striking out boldly on their own, most of them
are clutching (紧握) at one another's hands for reassurance.
     They claim they want to dress as they please. But they all wear the same clothes. They set off in new
directions in music. But somehow they all end up huddled (聚在一起) round listening to the same record. Their reason for thinking or acting in thusandsuch a way is that the crowd is doing it. They have come out
of their cocoon (蚕茧) into a larger_cocoon.
     It has become harder and harder for a teenager to stand up against the popularity wave and to go his
or her own way. Industry has firmly carved out a teenage market. These days every teenager can learn
from the advertisements what a teenager should have and be. And many of today's parents have come
to award high marks for the popularity of their children. All this adds up to a great barrier for the teenager who wants to find his or her own path.
     But the barrier is worth climbing over. The path is worth following. You may want to listen to classical music instead of going to a party. You may want to collect rocks when everyone else is collecting records. You may have some thoughts that you don't care to share at once with your classmates. Well, go to it.
Find yourself. Be yourself. Popularity will come-with the people who respect you for who you are. That
is the only kind of popularity that really counts.

1. In this passage, the author wants to tell ________.
A. teenagers to try to pursue their real selves
B. readers to try to be popular with people around
C. parents to try to control and guide their children
D. people to try to understand and respect each other

2. The author disapproves of rebelling teenagers ________.
A. growing away from their parents
B. following the popularity trend
C. walking a new way on their own
D. turning to their friends for help

3.The phrase "larger cocoon" at the end of the second paragraph refers to ________.
A. the distractive and variable society
B. the dazzling music world
C. the parental care and love
D. the popularity wave in the society

      Even plants can run a fever, especially when they're under attack by insects or disease. But unlike
human, plants can have their temperature taken from 3,000 feet away-straight up. A decade ago,
adopting the infrared(红外线)scanning technology developed for military purposes and other satellites,
physicist Stephen Paley came up with a quick way to take the temperature of crops to determine which
ones are under stress. The goal was to let farmers precisely target pesticide(杀虫剂)spraying rather than
rain poison on a whole field, which invariably includes plants that don't have pest problems.
     Even better, Paley's Remote Scanning Services Company could detect crop problems before they
became visible to the eye. Mounted on a plane flown at 3,000 feet at night, an infrared scanner measured
the heat emitted by crops. The data were transformed into a colourcoded map showing where plants
were running "fevers". Farmers could then spotspray, using 50 to 70 percent less pesticide than they
otherwise would.
      The bad news is that Paley's company closed down in 1984, after only three years. Farmers resisted
the new technology and longterm backers were hard to find. But with the renewed concern about
pesticides on produce, and refinements in infrared scanning, Paley hopes to get back into operation.
Agriculture experts have no doubt the technology works. "This technique can be used on 75 percent of
agricultural land in the United States, " says George Oerther of Texas A & M. Ray Jackson, who recently retired from the Department of Agriculture, thinks remote infrared crop scanning could be adopted by the end of the decade.  But only if Paley finds the financial backing which he failed to obtain 10 years ago.

1. Plants will send out an increased amount of heat when they are________.
A. facing an infrared scanner
B. sprayed with pesticides
C. in poor physical condition
D. exposed to excessive sun rays

2. In order to apply pesticide spraying precisely, we can use infrared scanning to________.
A. estimate the damage to the crops
B. draw a colourcoded map
C. measure the size of the affected area
D. locate the problem area

3. Farmers can save a considerable amount of pesticide by________.
A. resorting to spotspraying
B. transforming poisoned rain
C. consulting infrared scanning experts
D. detecting crop problems at an early stage

     Nuclearpowered aircraft carriers are considered one of the most important marine weapons in the
20th century. So far, only two countries in the world, the USA and France, have ever produced them.
But these fearful fighting machines are about to enter Asia.
     The US Navy said last month that one of its nine nuclearpowered aircraft carriers will be sent to
Japan to replace the diesel(柴油)powered carrier Kitty Hawk in 2008. In an agreement on October
30, the two countries also planned to level up their military (军事的) cooperation and the USA called
for Japan to take a larger role in alliance military moves.
     It will be the first time that a nuclearpowered carrier is based in Japan. Bombed by US forces in
World War ? at Hiroshima and Nagasaki, Japan is the only world country to have been attacked by a
nuclear weapon. Therefore, the citizens are highly sensitive to where nuclearpowered weapons are
based.
      "A radiation leak at Yokosuka would kill 100,000 people as far away as Tokyo, and could cause
billions of dollars in damage," said Masahiko Goto, leader of a protest group in Yokosuka. His group
has collected more than 300,000 signatures of people across Japan opposed to the nuclear carrier.
     The 44yearold Kitty Hawk, the US Navy's oldest active ship, has been based in Yokosuka since
1998. It had returned to the US to be decommissioned in 2008. The new carrier, yet to be unveiled,_
will travel faster, be capable of supporting longer operations and carry with it the Navy's most modern
technology.
     Experts pointed that this change is not only to strengthen the USJapan military alliance but also to
keep the military power of China and North Korea within limits. However, even Japanese experts don't
believe that the two countries are threats to the region.
     "There is no need for Japan to have a nuclear carrier as defense," said Tetsuo Maeda, an international
relations professor at Tokyo International University. He said that the change of ship indicates an
increased military capability in the region, much more than what is needed.

1. With such a formidable weapon to enter its country, Japanese citizens ________.
A. are aware of its benefits to the country
B. are anxious about its potential danger
C. are curious about the advanced technology
D. are against where the carrier will be based

2. The replacement of the aircraft carrier is intended to________.
A. set up a kind of base in Japan
B. strengthen the USJapan military alliance
C. show Japan's greater military capability
D. get rid of the dated marine weapon

3. From the story, we learn that________.
A. no other countries except the USA and France possess aircraft carriers
B. Japan has long planned to increase its military capability with new weapons
C. Japan will be the first country in Asia to have a nuclear aircraft carrier
D. Japan will be the third country to produce a nuclearpowered aircraft carrier

4. The underlined word "unveiled" in the fifth paragraph probably means________.
A. perfected  
B. discussed about
C. produced  
D. brought to view