It killed many baby bald eagles.
15. A) They found ways to speed up the reproduction of bald eagles.
B) They developed new types of feed for baby bald eagles.
C) They explored new ways to hatch baby bald eagles.
D) They brought in bald eagles from Canada.
16. A) Pollution of the environment C) Over-killing by hunters.
B) A new generation of pest killers. D) Destruction of their natural homes.
Passage Three
Questions 17 to 20 are based on the passage you have just heard.
17. A) Whether it can be detected and checked.
B) Whether it will lead to widespread food shortage.
C) Whether global warming will speed up in the future.
D) Whether it will affect their own lives.
18. A) Many species have moved further north.
B) Many new species have come into existence.
C) Many species have developed a habit of migration.
D) Many species have become less sensitive to climate.
19. A) Storms and floods. C) Less space for their growth.
B) Disease and fire. D) Rapid increase of the animal population.
20. A) They will gradually die out.
B) They will be able to survive in the preserves.
C) They will have to migrate to find new homes.
D) They will face extinction without artificial reproduction.
Part II Reading Comprehension (35 minutes)
Directions: There are 4 passages in this part. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A), B), C) and D). You should decide on the best choice and mark the corresponding letter on the Answer Sheet with a single line through the centre.
Passage One
Questions 21 to 25 are based on the following passage.
In the villages of the English countryside there are still people who remember the good old days when no one bothered to lock their doors. There simply wasn't any crime to worry about.
Amazingly, these happy times appear still to be with us in the world's biggest community. A new study by Dan Farmer, a gifted programmer, using an automated investigative program of his own called SATAN, shows that the owners of well over half of all World Wide Web sites have set up home without fitting locks to their doors.
SATAN can try out a variety of well-known hacking (黑客的) tricks on an Internet site with-out actually breaking in. Farmer has made the program publicly available, amid much criticism. A person with evil intent could use it to hunt down sites that are easy to burgle (闯入……行窃).
But Farmer is very concerned about the need to alert the public to poor security and, so far, events have proved him right. SATAN has done more to alert people to the risks than cause new disorder.
So is the Net becoming more secure? Far from it. In the early days, when you visited a Web site your browser simply looked at the content. Now the Web is full of tiny programs that automatically download when you look at a Web page, and run on your own machine. These programs could, if their authors wished, do all kinds of nasty things to your computer.
At the same time, the Net is increasingly populated with spiders, worms, agents and other types of automated beasts designed to penetrate the sites and seek out and classify information. All these make wonderful tools for antisocial people who want to invade weak sites and cause damage.
But let's look on the bright side. Given the lack of locks, the Internet is surely the world's biggest (almost) crime-free society. Maybe that is because hackers are fundamentally honest. Or that there currently isn't much to steal. Or because vandalism ( 恶意破坏) isn't much fun unless you have a peculiar dislike for someone.
Whatever the reason, let's enjoy it while we can. But expect it all to change, and security to become the number one issue, when the most influential inhabitants of the Net are selling services they want to be paid for.
21. By saying "... owners of well over half of all World Wide Web sites have set up home without fitting locks to their doors" (Lines 3-4, Para. 2), the author means that _____.
A) those happy times appear still to be with us
B) there simply wasn't any crime to worry about
C) many sites are not well-protected
D) hackers try out tricks on an Internet site without actually breaking in
22. SATAN, a program designed by Dan Fanner can be used ____________.
A) to investigate the security of Internet sites
B) to improve the security of the Internet system
C) to prevent hackers from breaking into website
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