Passage Two
Questions 26 to 30 are based on the following passage.
Every living thing has what scientists call a biological clock that controls
behavior. It tells plants when to form flowers and insects when to leave protective
cocoon（繭）and fly away. And it tells animals and human beings when to awaken,
sleep, and seek food. It controls our body temperatures, the release of some
hormones（激素）and even dreams.
Events outside the plant and animal affect its actions. Scientists recently found
that a tiny animal called Siberian hamster changes the color of its fur because
of the number of hours of daylight. In shorter days of winter its fur becomes
white. The fur becomes gray-brown in longer hours of daylight in summer.
Inner signals control other biological clocks. German scientists found that some
internal one seems to order birds to begin their migration flights two times each
year. Birds prevented from flying become restless when it is time for the trip.
But they become calm again when the time of the flight has ended.
A mix of outside and internal events controls some biological clocks; such things
as heartbeat and the daily change from sleep to walking take place because of
both external and internal signals.
Scientists are beginning to learn which parts of the brain contain the biological
clocks. A researcher at Harvard University ─ Dr. Martin Moore Ede ─ said a small
group of cells near the front of the brain seems to control the timing of some
of our actions. Probably there are other cells to control other body activities.
He is studying how they affect the way we do our work. Most of us have great
difficulty if we must often change to different work hours. It can take many days
for a human body to accept a major change in work hours. Industrial officials
should have a better understanding of biological clocks and how they affect
workers. He said such an understanding could reduce sickness and accidents at
work, and would help increase production.
26. Which of the following can not be controlled by biological clocks?
[A] Dreams.
[B] when and what to eat.
[C] Body temperature.
[D] When the flowers should open.
27. The author mentions Siberian hamster to illustrate that _________.
[A] every living thing has a biological clock
[B] Siberian hamster is a highly adaptive species
[C] biological clocks can change an animal’s skin color
[D] external factors can affect the behavior of an organism
28. From the passage we can infer that __________.
[A] biological clocks are responsible for all the human behaviors
[B] biological clocks are too mysterious to be explained
[C] heartbeat and some daily activities affect biological clocks
[D] studies on biological clocks can throw some light on human actions
29. Why should industrial officials have a better understanding of biological
clocks?
[A] Because some cells in the brain are very important.
[B] Because it is very hard to change working time.
[C] Because it may lead to improvement of work efficiency.
[D] Because it takes a long time for a person to get used to the shift of work
hours.
30. The best title for the passage could be _________.
[A] A Brief Account of Biological Clocks
[B] Biological Clocks and Work Efficiency
[C] How Biological Clocks Work
[D] The location of Biological Clocks
Passage Three
Questions 31 to 35 are based on the following passage.
“There is no arguing about taste”─ runs the Latin proverb. But taste did not
just happen. Cultural, historical, biological and environmental events have
interacted to cause frogs, for example, to be viewed as delicious in southern
China but to be regarded with revulsion（厭惡）in northern China. Even though
much remains unknown, tastes cannot be dismissed as inarguable or illogical; an
attempt will be made here to discover why, as Lucretius put it,“What is food
to one man may be fierce poison to others?”
Among the approximately thirty million tribal people of India, a total of 250
animal species are avoided by one group or another. Most of these people will
not eat meat from a tiger or any of various snakes. Although they say they feel
a relationship with these animals, it is obvious that both are highly dangerous
and that hunting them systematically would be foolish.
Monkeys are avoided, probably because they look like human beings in appearance;
in these tribes, man-eating is viewed as extremely cruel. A reluctance to eat
some female animals has been attributed to respect for the mother’s role, but
it could also be due to a policy of allowing the females to reproduce and provide
more young for people. Many tribes avoid eating any animal that has died of unknown
causes an intelligent attitude in view of the possibility that the animal might
have died from a disease that could spread to humans. Animals that consume garbage
are similarly avoided, an adaptive step that prevents contact with parasites
（寄生蟲）, and that might explain why members of one tribe eat any of twenty-one
different species of rats, but not the house that.
31.“There is no arguing about taste”, which means ___________.
[A] people don’t like to talk about food
[B] one’s taste in food is hard to explain
[C] there is no quarrelling about to eat
[D] no arguments about taste have been heard of before
32. It can be concluded from the first paragraph that ____________.
[A] the author is against eating frogs
[B] taste is illogical and inarguable
[C] some types of frogs are poisonous
[D] taste is influenced by many factors
33. The tribal people in India don’t eat snakes because _____________.
[A] they are very dangerous
[B] they are respected by Indians
[C] they may spread disease
[D] they help kill rats
34. The tribal people in India may not eat the following animals EXCEPT _________.
[A] donkeys
[B] tigers
[C] female deer
[D] house rats
35. The passage is probably written for the purpose of ________.
[A] introducing the eating habit of Indian tribal people
[B] distinguishing different types of taste
[C] accounting for people’s different choices of taste
[D] explaining the relationship between taste and tribes
Questions 26 to 30 are based on the following passage.
Every living thing has what scientists call a biological clock that controls
behavior. It tells plants when to form flowers and insects when to leave protective
cocoon（繭）and fly away. And it tells animals and human beings when to awaken,
sleep, and seek food. It controls our body temperatures, the release of some
hormones（激素）and even dreams.
Events outside the plant and animal affect its actions. Scientists recently found
that a tiny animal called Siberian hamster changes the color of its fur because
of the number of hours of daylight. In shorter days of winter its fur becomes
white. The fur becomes gray-brown in longer hours of daylight in summer.
Inner signals control other biological clocks. German scientists found that some
internal one seems to order birds to begin their migration flights two times each
year. Birds prevented from flying become restless when it is time for the trip.
But they become calm again when the time of the flight has ended.
A mix of outside and internal events controls some biological clocks; such things
as heartbeat and the daily change from sleep to walking take place because of
both external and internal signals.
Scientists are beginning to learn which parts of the brain contain the biological
clocks. A researcher at Harvard University ─ Dr. Martin Moore Ede ─ said a small
group of cells near the front of the brain seems to control the timing of some
of our actions. Probably there are other cells to control other body activities.
He is studying how they affect the way we do our work. Most of us have great
difficulty if we must often change to different work hours. It can take many days
for a human body to accept a major change in work hours. Industrial officials
should have a better understanding of biological clocks and how they affect
workers. He said such an understanding could reduce sickness and accidents at
work, and would help increase production.
26. Which of the following can not be controlled by biological clocks?
[A] Dreams.
[B] when and what to eat.
[C] Body temperature.
[D] When the flowers should open.
27. The author mentions Siberian hamster to illustrate that _________.
[A] every living thing has a biological clock
[B] Siberian hamster is a highly adaptive species
[C] biological clocks can change an animal’s skin color
[D] external factors can affect the behavior of an organism
28. From the passage we can infer that __________.
[A] biological clocks are responsible for all the human behaviors
[B] biological clocks are too mysterious to be explained
[C] heartbeat and some daily activities affect biological clocks
[D] studies on biological clocks can throw some light on human actions
29. Why should industrial officials have a better understanding of biological
clocks?
[A] Because some cells in the brain are very important.
[B] Because it is very hard to change working time.
[C] Because it may lead to improvement of work efficiency.
[D] Because it takes a long time for a person to get used to the shift of work
hours.
30. The best title for the passage could be _________.
[A] A Brief Account of Biological Clocks
[B] Biological Clocks and Work Efficiency
[C] How Biological Clocks Work
[D] The location of Biological Clocks
Passage Three
Questions 31 to 35 are based on the following passage.
“There is no arguing about taste”─ runs the Latin proverb. But taste did not
just happen. Cultural, historical, biological and environmental events have
interacted to cause frogs, for example, to be viewed as delicious in southern
China but to be regarded with revulsion（厭惡）in northern China. Even though
much remains unknown, tastes cannot be dismissed as inarguable or illogical; an
attempt will be made here to discover why, as Lucretius put it,“What is food
to one man may be fierce poison to others?”
Among the approximately thirty million tribal people of India, a total of 250
animal species are avoided by one group or another. Most of these people will
not eat meat from a tiger or any of various snakes. Although they say they feel
a relationship with these animals, it is obvious that both are highly dangerous
and that hunting them systematically would be foolish.
Monkeys are avoided, probably because they look like human beings in appearance;
in these tribes, man-eating is viewed as extremely cruel. A reluctance to eat
some female animals has been attributed to respect for the mother’s role, but
it could also be due to a policy of allowing the females to reproduce and provide
more young for people. Many tribes avoid eating any animal that has died of unknown
causes an intelligent attitude in view of the possibility that the animal might
have died from a disease that could spread to humans. Animals that consume garbage
are similarly avoided, an adaptive step that prevents contact with parasites
（寄生蟲）, and that might explain why members of one tribe eat any of twenty-one
different species of rats, but not the house that.
31.“There is no arguing about taste”, which means ___________.
[A] people don’t like to talk about food
[B] one’s taste in food is hard to explain
[C] there is no quarrelling about to eat
[D] no arguments about taste have been heard of before
32. It can be concluded from the first paragraph that ____________.
[A] the author is against eating frogs
[B] taste is illogical and inarguable
[C] some types of frogs are poisonous
[D] taste is influenced by many factors
33. The tribal people in India don’t eat snakes because _____________.
[A] they are very dangerous
[B] they are respected by Indians
[C] they may spread disease
[D] they help kill rats
34. The tribal people in India may not eat the following animals EXCEPT _________.
[A] donkeys
[B] tigers
[C] female deer
[D] house rats
35. The passage is probably written for the purpose of ________.
[A] introducing the eating habit of Indian tribal people
[B] distinguishing different types of taste
[C] accounting for people’s different choices of taste
[D] explaining the relationship between taste and tribes