Passage One
Many animals have an excellent sense of smell, which they use in hunting. On the other hand, their eyesight may be poor. Dogs, for example, have poor eyesight and no color vision. They see only shades of gray. But the dog’s sense of smell is extraordinary,
The kind of dog known as Alsatian has 220 million olfactory (嗅觉) cells. Man has five million. Scientists believe that the Alsatian is one million times better than man in finding out odors.
The human sense of smell, however, is really quite good. The average human being can distinguish more than 10 000 different odors.
Passage Five
Many animals are used to help scientists find cures for diseases. One of the most common animals used is monkeys, or primates. There are groups of people who want to stop the research on animals. They are called animal rights activists.
The scientists say their research could help save the lives of many men, women and children. They try to cure diseases like cancer and AIDS.
The animal rights activists say the animals suffer. They take baby monkeys away from their mothers, and sometimes holes are drilled in their heads. The activists have tried to stop the research for the past 10 years. They let animals go free or damage the labs.
The University of California at Davis has 3,800 rhesus macaque monkeys. It is one of the largest primate research labs. The activists sent letters to researchers at Davis and about eighty other researchers around the country, whose names were on the web pages. The warning letters had razor blades hidd
A. to see the animals
B. to protect animal's rights
C. to stop scientific research
D. to fight with police
Passage Two
Many people think a telephone is essential. But I think it is a pest and a time waster. Very often you find it impossible to escape from some idle or inquisitive chatter-box, or from somebody who wants something for nothing. If you have a telephone in your own house, you will admit that it tends to ring when you least want it to ring; when you are asleep, or in the middle of a meal or a conversation, or when you are just going out , or when you are in your bath. Are you strong-minded enough to ignore it, to say to yourself, "Ah, well it will all be the same in a hundred year’s time" You are not. You think there may be some important news or message for you. I can assure you that if a message is really important it will reach you sooner or later. Have you never rushed dripping from the bath, or chewing from the tab]e, or dazed from the bed, only to be told that you are a wrong number
But you will say, you need not have your
A. he hates idle talk
B. it always comes at an inopportune time
C. it might carry some important message
D. he doesn't want to be impolite to any one on the telephone
我来回答:
