大学英语四级题库_大学英语题库

单项选择题

Mars is not, it seems, the dry old planet we once believed it to be. Astronauts who are (1) to go there in the next decade may find plenty (2) water to slake(消除) their thirst.
And with water present the (3) of finding some sort of life on Mars are (4) brighter.
This is the view of 40 (5) all over the world who have been analyzing (6) of pictures and other scientific (7) obtained by robot explorers in the sixties and seventies.
To begin with, scientists thought the Red Planet was as (8) as the Moon with dust storms swirling over vast sandy (9) . But now the picture is very different with mountains and valleys carved by (10) glaciers and torrential rivers rushing and rumbling deep underground.
In a report on the (11) of the Martian pictures Dr. Michael Car of the U.S. Geological Survey comments, "I am (12) there’s lots of water on Mars." Any surface water will be in the (13) of ice. But it could (14) explorers having to take so much fresh (15) with them.
The report says (16) Mars probably had a warmer climate in ages (17) due to its axis having been more steeply tilted towards the Sun.
(18) convincing signs of plant or animal life have been (19) by instruments soft. landed on Mars, (20) only the immediate vicinity of landing vehicles could be examined.

A．convinced
B．guaranteed
C．believed
D．proved

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1.单项选择题

Mars is not, it seems, the dry old planet we once believed it to be. Astronauts who are (1) to go there in the next decade may find plenty (2) water to slake(消除) their thirst.
And with water present the (3) of finding some sort of life on Mars are (4) brighter.
This is the view of 40 (5) all over the world who have been analyzing (6) of pictures and other scientific (7) obtained by robot explorers in the sixties and seventies.
To begin with, scientists thought the Red Planet was as (8) as the Moon with dust storms swirling over vast sandy (9) . But now the picture is very different with mountains and valleys carved by (10) glaciers and torrential rivers rushing and rumbling deep underground.
In a report on the (11) of the Martian pictures Dr. Michael Car of the U.S. Geological Survey comments, "I am (12) there’s lots of water on Mars." Any surface water will be in the (13) of ice. But it could (14) explorers having to take so much fresh (15) with them.
The report says (16) Mars probably had a warmer climate in ages (17) due to its axis having been more steeply tilted towards the Sun.
(18) convincing signs of plant or animal life have been (19) by instruments soft. landed on Mars, (20) only the immediate vicinity of landing vehicles could be examined.

A．diagnosis
B．syntheses
C．analysis
D．analyses

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2.单项选择题

Most worthwhile careers require some kind of specialized training. Ideally, therefore, the choice of an (1) should be made even before choice of a curriculum in high school. Actually, (2) , most people make several job choices during their working lives, (3) because of economic and industrial changes and partly to improve their position. The "one perfect job" does not (4) . Young people should (5) enters into a broad flexible training program that will (6) them for a field of work rather than for a single (7) .
Unfortunately many young people have to make career plans (8) benefit of help from a(n) (9) vocational counselor or psychologist. Knowing (10) about the occupational world, or themselves for that matter, they choose their lifework on a hit-or-miss basis. Some (11) from job to job. Others (12) to work in which they are unhappy and for which they are not fitted.
One common mistake is choosing an occupation for (13) real or imagined prestige. Too many high school students--or their parents for them--choose the professional field, (14) both the relatively small proportion of workers in the professions and the extremely high educational and personal (15) .The imagined or real prestige of a profession or a white-collar job is no good (16) for choosing it as life’s work. (17) , these occupations are not always well paid, since a large (18) of jobs are in mechanical and manual work, the (19) of young people should give serious (20) to these fields.

A．turn
B．drift
C．leave
D．float

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3.单项选择题

The Internet has become a commonplace for us. While (1) the Internet, we should not (2) the alarm bells sounding in our ears, reminding us of keeping (3) for on-line crimes. Last year, the Melissa and Explore Zip virus caused chaos (4) the Internet. Last week the "I love you" bug played havoc (5) the world. What will be the next No one knows.
Many on-line crimes are not so different to (6) seen in real world, the spreading of fake data, cheating and blackmail, (7) property rights infringements and privacy violations. But computer hackers also create new forms of crime (8) the Internet changes the world into a "global village".
With the (9) of e-business, on-line crimes could not only cause great damage to (10) , but could also threaten the (11) of national political, economic and cultural orders. The (12) legal system in most countries (13) weak when dealing with on-line crimes, (14) to the sophisticated technology involved. For this reason, many countries are considering (15) Internet laws to curb on-line crimes.
In China, (16) there are millions of Internet surfers, it is more important to formulate new laws and rules on network security than to (17) the existing ones. When drafting and (18) new laws, China should also (19) the relations between protecting network security (20) the sound development of Internet.

A．until
B．before
C．as
D．alter

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4.单项选择题

Most worthwhile careers require some kind of specialized training. Ideally, therefore, the choice of an (1) should be made even before choice of a curriculum in high school. Actually, (2) , most people make several job choices during their working lives, (3) because of economic and industrial changes and partly to improve their position. The "one perfect job" does not (4) . Young people should (5) enters into a broad flexible training program that will (6) them for a field of work rather than for a single (7) .
Unfortunately many young people have to make career plans (8) benefit of help from a(n) (9) vocational counselor or psychologist. Knowing (10) about the occupational world, or themselves for that matter, they choose their lifework on a hit-or-miss basis. Some (11) from job to job. Others (12) to work in which they are unhappy and for which they are not fitted.
One common mistake is choosing an occupation for (13) real or imagined prestige. Too many high school students--or their parents for them--choose the professional field, (14) both the relatively small proportion of workers in the professions and the extremely high educational and personal (15) .The imagined or real prestige of a profession or a white-collar job is no good (16) for choosing it as life’s work. (17) , these occupations are not always well paid, since a large (18) of jobs are in mechanical and manual work, the (19) of young people should give serious (20) to these fields.

A．little
B．few
C．much
D．more

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5.单项选择题

Mars is not, it seems, the dry old planet we once believed it to be. Astronauts who are (1) to go there in the next decade may find plenty (2) water to slake(消除) their thirst.
And with water present the (3) of finding some sort of life on Mars are (4) brighter.
This is the view of 40 (5) all over the world who have been analyzing (6) of pictures and other scientific (7) obtained by robot explorers in the sixties and seventies.
To begin with, scientists thought the Red Planet was as (8) as the Moon with dust storms swirling over vast sandy (9) . But now the picture is very different with mountains and valleys carved by (10) glaciers and torrential rivers rushing and rumbling deep underground.
In a report on the (11) of the Martian pictures Dr. Michael Car of the U.S. Geological Survey comments, "I am (12) there’s lots of water on Mars." Any surface water will be in the (13) of ice. But it could (14) explorers having to take so much fresh (15) with them.
The report says (16) Mars probably had a warmer climate in ages (17) due to its axis having been more steeply tilted towards the Sun.
(18) convincing signs of plant or animal life have been (19) by instruments soft. landed on Mars, (20) only the immediate vicinity of landing vehicles could be examined.

A．energetic
B．great
C．massive
D．mighty

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6.单项选择题

The Internet has become a commonplace for us. While (1) the Internet, we should not (2) the alarm bells sounding in our ears, reminding us of keeping (3) for on-line crimes. Last year, the Melissa and Explore Zip virus caused chaos (4) the Internet. Last week the "I love you" bug played havoc (5) the world. What will be the next No one knows.
Many on-line crimes are not so different to (6) seen in real world, the spreading of fake data, cheating and blackmail, (7) property rights infringements and privacy violations. But computer hackers also create new forms of crime (8) the Internet changes the world into a "global village".
With the (9) of e-business, on-line crimes could not only cause great damage to (10) , but could also threaten the (11) of national political, economic and cultural orders. The (12) legal system in most countries (13) weak when dealing with on-line crimes, (14) to the sophisticated technology involved. For this reason, many countries are considering (15) Internet laws to curb on-line crimes.
In China, (16) there are millions of Internet surfers, it is more important to formulate new laws and rules on network security than to (17) the existing ones. When drafting and (18) new laws, China should also (19) the relations between protecting network security (20) the sound development of Internet.

A．intellectual
B．intelligence
C．knowledge
D．cultural

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7.单项选择题

Mars is not, it seems, the dry old planet we once believed it to be. Astronauts who are (1) to go there in the next decade may find plenty (2) water to slake(消除) their thirst.
And with water present the (3) of finding some sort of life on Mars are (4) brighter.
This is the view of 40 (5) all over the world who have been analyzing (6) of pictures and other scientific (7) obtained by robot explorers in the sixties and seventies.
To begin with, scientists thought the Red Planet was as (8) as the Moon with dust storms swirling over vast sandy (9) . But now the picture is very different with mountains and valleys carved by (10) glaciers and torrential rivers rushing and rumbling deep underground.
In a report on the (11) of the Martian pictures Dr. Michael Car of the U.S. Geological Survey comments, "I am (12) there’s lots of water on Mars." Any surface water will be in the (13) of ice. But it could (14) explorers having to take so much fresh (15) with them.
The report says (16) Mars probably had a warmer climate in ages (17) due to its axis having been more steeply tilted towards the Sun.
(18) convincing signs of plant or animal life have been (19) by instruments soft. landed on Mars, (20) only the immediate vicinity of landing vehicles could be examined.

A．deserts
B．mountains
C．seas
D．rivers

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8.单项选择题

Most worthwhile careers require some kind of specialized training. Ideally, therefore, the choice of an (1) should be made even before choice of a curriculum in high school. Actually, (2) , most people make several job choices during their working lives, (3) because of economic and industrial changes and partly to improve their position. The "one perfect job" does not (4) . Young people should (5) enters into a broad flexible training program that will (6) them for a field of work rather than for a single (7) .
Unfortunately many young people have to make career plans (8) benefit of help from a(n) (9) vocational counselor or psychologist. Knowing (10) about the occupational world, or themselves for that matter, they choose their lifework on a hit-or-miss basis. Some (11) from job to job. Others (12) to work in which they are unhappy and for which they are not fitted.
One common mistake is choosing an occupation for (13) real or imagined prestige. Too many high school students--or their parents for them--choose the professional field, (14) both the relatively small proportion of workers in the professions and the extremely high educational and personal (15) .The imagined or real prestige of a profession or a white-collar job is no good (16) for choosing it as life’s work. (17) , these occupations are not always well paid, since a large (18) of jobs are in mechanical and manual work, the (19) of young people should give serious (20) to these fields.

A．competent
B．competitive
C．aggressive
D．effective

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9.单项选择题

Most worthwhile careers require some kind of specialized training. Ideally, therefore, the choice of an (1) should be made even before choice of a curriculum in high school. Actually, (2) , most people make several job choices during their working lives, (3) because of economic and industrial changes and partly to improve their position. The "one perfect job" does not (4) . Young people should (5) enters into a broad flexible training program that will (6) them for a field of work rather than for a single (7) .
Unfortunately many young people have to make career plans (8) benefit of help from a(n) (9) vocational counselor or psychologist. Knowing (10) about the occupational world, or themselves for that matter, they choose their lifework on a hit-or-miss basis. Some (11) from job to job. Others (12) to work in which they are unhappy and for which they are not fitted.
One common mistake is choosing an occupation for (13) real or imagined prestige. Too many high school students--or their parents for them--choose the professional field, (14) both the relatively small proportion of workers in the professions and the extremely high educational and personal (15) .The imagined or real prestige of a profession or a white-collar job is no good (16) for choosing it as life’s work. (17) , these occupations are not always well paid, since a large (18) of jobs are in mechanical and manual work, the (19) of young people should give serious (20) to these fields.

A．with
B．for
C．without
D．to

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10.单项选择题

The Internet has become a commonplace for us. While (1) the Internet, we should not (2) the alarm bells sounding in our ears, reminding us of keeping (3) for on-line crimes. Last year, the Melissa and Explore Zip virus caused chaos (4) the Internet. Last week the "I love you" bug played havoc (5) the world. What will be the next No one knows.
Many on-line crimes are not so different to (6) seen in real world, the spreading of fake data, cheating and blackmail, (7) property rights infringements and privacy violations. But computer hackers also create new forms of crime (8) the Internet changes the world into a "global village".
With the (9) of e-business, on-line crimes could not only cause great damage to (10) , but could also threaten the (11) of national political, economic and cultural orders. The (12) legal system in most countries (13) weak when dealing with on-line crimes, (14) to the sophisticated technology involved. For this reason, many countries are considering (15) Internet laws to curb on-line crimes.
In China, (16) there are millions of Internet surfers, it is more important to formulate new laws and rules on network security than to (17) the existing ones. When drafting and (18) new laws, China should also (19) the relations between protecting network security (20) the sound development of Internet.

A．which
B．that
C．them
D．those

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