Many of the world’s pollution problems have been caused by the crowding of large

Many of the world’s pollution problems have been caused by the crowding of large groups of people into the cities. Supply for the needs of the people leads to further 1 by industry. If the rapid increase of world2 continues at the present rate, there may be much greater3 to human beings. Some scientists4 of the increase in numbers of people as “population pollution（人口公害）”.

About 2, 000 years ago, the world population was about 250 million. It 5a billion in 1850. By 1930 the population was two billion. It is now six billion. It is 6to double by the year 2020. If the population 7 to grow at the same rate, there will be 25 billion people in the 8 a hundred years from now.

Man has been9  the earth’s resources more and more10  over the past years. Some of them are almost gone. Now many people believe that man’s11  problem is how to control the12  of the population. The material supplies in the world will be far from enough to 13 the human population if the present rate of increase continues. There is already over-crowding（过分拥挤）in many cities and 14 in some countries. Many people believe that human survival（生存） in the future 15 on the answer to the question. 1.

A.progress

B.pollution

C.education

D.production

A.agriculture

B.industry

C.environment

D.population

A.danger

B.harm

C.benefit

D.hardship

A.dream

B.approve

C.rid

D.speak

A.got

B.took

C.brought

D.reached

A.suggested

B.hoped

C.expected

D.said

A.continues

B.fails

C.tries

D.means

A.world

B.country

C.star

D.end

A.discovering

B.using

C.digging

D.destroying

A.seriously

B.dangerously

C.rapidly

D.steadily

A.greatest

B.easiest

C.lightest

D.simplest

A.existence

B.start

C.growth

D.birth

A.increase

B.decrease

C.report

D.support

A.discussion

B.starvation

C.construction

D.argument

A.depends

B.agrees

C.saves

D.passes

试题答案

BDBDD CAABC ACDBA