5.3 完形填空综合练习Passage Three

Passage Three
    The growth of population during the past few centuries is no proof that population will continue to grow straight upward toward infinity and doom. On the 1 , demographic history offers evidence that population growth has not been at all constant. According to paleoecologist Edward Deevey, the 2 million years show three momentous changes. The first, a rapid increase in population around one million B.C. , followed the 3 of toolmaking and toolusing. But 4 the new power from the use of tools had been exploited, the 5 of world population growth fell and became almost stable.
    The next rapid jump in population started perhaps 10,000 years ago, when men began to keep herds, plow and 6 the earth. Once again when initial productivity had been absorbed, the rate of population growth abated.
    These two episodes suggest that the 7 great change, the present rapid growth, which began in the West between 250 and 350 years ago, may also 8 down when, or if，technology begins to yield fewer innovations. Of course, the 9 revolution may continue without foreseeable end. Population can be expected in the long run to adjust to productivity. And when one 10 this view, population growth is seen to represent economic progress and human triumph rather than social failure.

 1.［A］ opposite   ［B］ contrary   ［C］ contrast   ［D］ contract
 2.［A］ last       ［B］ early      ［C］ preceding  ［D］ past
 3.［A］ innovations［B］ discoveries［C］ creations  ［D］ findings
 4.［A］ if         ［B］ if only    ［C］ now that   ［D］ when
 5.［A］ speed      ［B］ progress   ［C］ rate       ［D］ ration
 6.［A］ decorate   ［B］ plant      ［C］ search     ［D］ dig
 7.［A］ another    ［B］ remaining  ［C］ three      ［D］ third
 8.［A］ decrease   ［B］ slow       ［C］ fall       ［D］ turn
 9.［A］ popular    ［B］ current    ［C］ fashionable［D］ uptodate
10.［A］ dapts      ［B］ takes      ［C］ sees       ［D］ meets