The past 22 years have really been amazing, and every prediction we' ve made abou

In the past, American families (16) to be quite large. Parents (17) five or more were common. Over the years, the (18 )of the family has decreased. One reason for this is an increase in the (19) of living (20) the average, children attend schools for more years than they used to, making them (21) dependent on their families longer. Moreover, children nowadays are better (22) and have more money to spend on (23). The parents usually take the responsibility 24 all the expense. Meanwhile, families are less close than they used to be. More and more American mothers 25 away from home.

16.A. tended

B. wanted

C. seemed

D. extended

17.A. breeding

B. raising

C. feeding

D. bringing

18.A. amount

B. number

C. size

D. scale

19.A. level

B. standard

C. wage

D. cost

20.A. On

B. By

C. At

D. From

21.A. finally

B. financially

C. fashionably

D. faintly

22.A. worn

B. wearing

C. dressing

D. dressed

23.A. luxury

B. activity

C. playing

D. entertainment

24.A. at

B. to

C. on

D. for

25.A. are

B. run

C. work

D. separate

A.A. benefited

B.B. has benefited

C.C. benefits

D.D. benefiting

A.permanent.

B.powerful.

C.imaginary.

D.dramatid

Over (the past) 20 years, the Internet has (helped change) our world in (either) way or another (for the better).

A．the past

B．as well as

C．to dinner

D．neither of

t.

A．cost

B．paid

C．spent

D．taken

ge groups of people into cities.Satisfying the 21 of the people leads to further polluting by industry.If the rapid increase in human population 22 at the present rate (比率), there may be much greater harm.Some scientists speak of the 23 in number of people as “Population Pollution”.

About 2000 years ago, the world 24 was probably about 250 million.It reached a billion in 1850.By 1930 the population was two billion.It is 25 three and a half billion.It is expected to double by the year 2000.If the population continues to grow at the same 26 , there would be 25 billion people in the world a hundred years from now.

Man has been using the earth’s 27 more and more rapidly over the years.Some of them are almost gone.Now many people believe that man’s greatest 28 is how to control the growth of this population.The materials in the world will not support the human population in time to come if the present rate of increase continues.29 there is over crowding in the cities and hunger in some countries.Can man’s rate of increase continue？

Many people believe that human survival (幸存者) in the future 30 on the answer to the question.

21.A.needs

B.supplies

C.service

D.supports

22.A.stops

B.continues

C.slows down

D.adds to

23.A.increase

B.reduce

C.country

D.improvement

24.A.people

B.situation

C.population

D.land

25.A.now

B.in the past

C.in the future

D.then

26.A.place

B.time

C.rate

D.result

27.A coal

B.oil

C.mines

D.resources

28.A.problem

B.power

C.plan

D.idea

29.A.Already

B.Yet

C.Still

D.Often

30.A.feeds

B.lives

C.keeps

D.depends

All she had done for him in the past few years was of no ______ (available).