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Passage 2
Questions 6 to 10 are based on the following passage:
When aluminum was first produced about a hundred and fifty years ago, it was
so difficult to separate form the ores in which it was found that its price was
higher than that of gold. The price remained high until a new process was
discovered for refining the metal with the aid of electricity approximately
three quarters of a century later. The new method was so much cheaper that
aluminum because practical for many purposes, one of which was making pots and
pans.
Aluminum is lightweight, rustproof and easily shaped into different forms. By
mixing it with other metals, scientists have been able to produce a variety of
alloys, some of which have the strength of steel but weigh only one third as
much.
Today, the uses of aluminum are innumerable. Perhaps its most important use
is in transportation. Aluminum is found in the engine of automobiles, in the
hulls of boats. It is also used in many parts of airplanes. In fact, the huge
“airbus” planes would probably never have been produced if aluminum did not
exist. By making vehicles lighter in weight aluminum has greatly reduced the
amount of fuel needed to move them, Aluminum is also being used extensively in
the building industry in some countries.
Since aluminum is such a versatile (多用的) metal, it is fortunate that bauxite
(铝土矿), which is one of its chief sources, is also one of the earth’s most
plentiful substances. As the source of aluminum is almost inexhaustible, we can
expect that more and more uses will be found for this versatile metal.
6. The price of aluminum was sharply reduced when people discovered a new
refining process with the aid of .
A. wind B. solar energy C. hydraulic power D. electricity
7. Aluminum is .
A. lightweight, rustproof but not easily shaped into different forms
B. heavyweight, rustproof and easily shaped into different forms
C. lightweight, rustproof and easily shaped into different forms
D. lightweight and easily shaped into different forms but it is easy to
become rusty
8. Which of the following is NOT true?
A. Aluminum is widely used in transportation.
B. Aluminum is also used in many parts of airplanes.
C. Aluminum is being used extensively in the building industry.
D. Aluminum is not used in its pure form.
9. Aluminum is found on earth mostly in the form of .
A. pure metal B. bauxite C. gold D. liquid
10. What is the passage talking about?
A. The features of aluminum and its functions. B. The process of
aluminum.
C. The discovery of aluminum. D. The promising future of aluminum.
Part III Cloze
Directions: There are twenty blanks in the following passage. For each blank
there are four choices. Choose the one that best fits into the passage and then
marks your answer on the Answer Sheet.
There are two factors which determine an individual’s intelligence. The first
is the sort of brain he is born 61 . Human brains differ considerably, 62 being
more capable than others. 63 no matter how good a brain he has to begin with, an
individual will have a low order of intelligence 64 he has opportunities to
learn. So the second factor is what 65 to the individual—the sort of environment
in which he is brought 66 . If an individual is handicapped (受阻碍) 67 , it is
likely that his brain will 68 to develop and he will 69 attain the level of
intelligence of which he is 70 .
The importance of environment in determining an individual’s intelligence can
be 71 by the case history of the identical twins, Peter and John. When the twins
were three months old, their parents died, and they are placed in 72 foster (寄养)
homes. Peter was reared by parents of low intelligence in an 73 community with
poor educational 74 . John, 75 , was educated in the home of well-to-do parents
who has been to college. This environmental 76 continued until the twins were 77
their late teens, 78 they were given tests to 79 their intelligence. John’s I.Q.
(智商) was 125, twenty-five points higher than the 80 and fully forty points
higher than his identical brother.
61. A. for B. by C. with D. in
62. A. most B. some C. many D. few
63. A. But B. For C. Still D. And
64. A. if B. thought C. as D. unless
65. A. refers B. applies C. happens D. concerns
66. A. about B. up C. forward D. forth
67. A. relatively B. intelligently C. regularly D. environmentally
68. A. fail B. help C. manage D. stop
69. A. ever B. never C. even D. nearly
70. A. able B. capable C. available D. acceptable
71. A. demonstrated B. denied C. neglected D. ignored
72. A. separate B. similar C. remote D. individual
73. A. omitted B. isolated C. enclosed D. occupied
74. A. possibilities B. opportunities C. capacities D. responsibilities
75. A. moreover B. consequently C. then D. however
76. A. exception B. division C. difference D. alteration
77. A. in B. by C. at C. for
78. A. while B. since C. when D. because
79. A. estimate B. count C. decide D. measure
80. A. average B. common C. usual D. ordinary
Scattered through the seas of the world are billions of tons of small plants
and animals called plankton. Most of these plants and animals are too small for
the human eye to see. They drift about lazily with the currents, providing a
basic food for many larger animals. Plankton has been described as the
equivalent of the grasses that grow on the dry land continents, and the
comparison is an appropriate one. In potential food value however, plankton far
outweighs that of the land grasses. One scientist has estimated that while
grasses of the world produce about 49 billion tons of valuable carbohydrates
each year. The sea’s plankton generates more than twice as much.
Despite its enormous food potential, little effort was made until recently to
farm plankton as we farm grasses on land. Now marine scientists have at last
begun to study this possibility, especially as the sea’s resources loom even
more important as a means of feeding an expanding world population.
No one yet has seriously suggested that “planktonburgers” may soon become
popular around the world. As a possible farmed supplementary food source,
however, plankton is gaining considerable interest among marine scientists.
One type of plankton that seems to have great harvest possibilities is a tiny
shrimplike creature called krill. Growing to two or three inches long, krill
provide the major food for the giant blue whale, the largest animal ever to
inhabit the Earth. Realizing that this whale may grow 100 feet and weigh 150
tons at maturity, it is not surprising that each one devours more than one ton
of krill daily.
Krill swim about just below the surface in huge schools sometimes miles wide,
mainly in the cold Antarctic. Because of their pink color, they often appear as
a solid reddish mass when viewed from a ship or from the air. Krill are very
high in food value. A pound of these crustaceans contains about 460
calories—about the same as shrimp or lobster, to which they are related.
If the krill can feed such huge creatures as whales, many scientists reason,
they must certainly be contenders as new food source for humans.
1.Which of the following best portrays the organization of the passage?
A.The author presents the advantages and disadvantages of plankton as a food
source.
B.The author quotes public opinion to support the argument for farming
plankton.
C.The author classifies the different food sources according to amount of
carbohydrate.
D.The author makes a general statement about plankton as a food source and
then moves to a specific example.
2.According to the passage, why is plankton regarded to be more valuable than
land grasses?
A.It is easier to cultivate.
B.It produces more carbohydrates.
C.It does not require soil.
D.It is more palatable.
3.Why does the author mention “planktonburgers”?
A.To describe the appearance of one type of plankton.
B.To illustrate how much plankton a whale consumes.
C.To suggest plankton as a possible food sources.
D.To compare the food values of beef and plankton.
4.What is mentioned as one conspicuous feature of krill?
A.They are the smallest marine animals.
B.They are pink in color.
C.They are similar in size to lobsters.
D.They have grass like bodies.
5.The author mentions all of the following as reasons why plankton could be
considered a human food source except that it is ___.
A.high in food value.
B.in abundant supply in the oceans.
C.an appropriate food for other animals.
D.free of chemicals and pollutants.
