Question

The climate will be warm and 1 with prolonged droughts in most of the world’s grain growing 2. Because of the increase in temperature, the ice cap will begin to melt and sea level is predicted to 3 about ten meters, causing flood in many areas.
In the atmosphere, a concentration of carbon dioxide acts like the 4 in the roof of a greenhouse. It allows the sun’s rays to pass 5 easily on the way to the earth’s 6, but prevents heat 7 by the earth from escaping back into space. 8, as the level of atmospheric carbon dioxide rises,because of the industrial burning of fossil fuels, this greenhouse effect could 9 the temperature of the earth. The burning of fossil fuels 10 carbon dioxide. Carbon dioxide accumulates(积聚) in the atmosphere, and 11 the greenhouse effect, the temperature of the earth’s surface could rise. 12 this warming up took place, the polar ice caps would begin to melt,13raising sea level. The 14 influence that seems to be cooling the earth is the variable behavior of the sun. As the sun rotates(旋转) on its orbit, it presents hotter or colder faces to the earth, and this seems to have a considerable effect 15 the distribution of the earth’s atmospheric pressure and on the wind circulation. The heat 16 of the sun also varied, the latest trend being 17, the heat output appears to be decreasing and the indications are that the earth’s 18 is entering a cooler cycle. Scientific models that take 19 account this 20 behavior of the sun are also predicting that the world should be entering a new Ice Age.

1. 1.
   1. A.
      wet
   2. B.
      rainy
   3. C.
      dry
   4. D.
      icy
2. 2.
   1. A.
      farms
   2. B.
      regions
   3. C.
      towns
   4. D.
      villages
3. 3.
   1. A.
      rise
   2. B.
      appear
   3. C.
      move
   4. D.
      raise
4. 4.
   1. A.
      glass
   2. B.
      shylight(天窗)
   3. C.
      chimney
   4. D.
      attic(顶楼)
5. 5.
   1. A.
      by
   2. B.
      over
   3. C.
      in
   4. D.
      through
6. 6.
   1. A.
      ground
   2. B.
      bottom
   3. C.
      floor
   4. D.
      surface
7. 7.
   1. A.
      taken in
   2. B.
      sent out
   3. C.
      admitted to
   4. D.
      taken out
8. 8.
   1. A.
      However
   2. B.
      Yet
   3. C.
      Afterwards
   4. D.
      Therefore
9. 9.
   1. A.
      benefit
   2. B.
      forbid
   3. C.
      raise
   4. D.
      effect
10. 10.
    1. A.
       leads to
    2. B.
       gives off
    3. C.
       results from
    4. D.
       joins hands
11. 11.
    1. A.
       as to
    2. B.
       as for
    3. C.
       without
    4. D.
       because of
12. 12.
    1. A.
       Whether
    2. B.
       Before
    3. C.
       If
    4. D.
       After
13. 13.
    1. A.
       so
    2. B.
       instead
    3. C.
       thus
    4. D.
       but
14. 14.
    1. A.
       natural
    2. B.
       unusual
    3. C.
       former
    4. D.
       ordinary
15. 15.
    1. A.
       in
    2. B.
       on
    3. C.
       over
    4. D.
       at
16. 16.
    1. A.
       input
    2. B.
       activity
    3. C.
       output
    4. D.
       movement
17. 17.
    1. A.
       downward
    2. B.
       upward
    3. C.
       forward
    4. D.
       onward
18. 18.
    1. A.
       pressure
    2. B.
       surface
    3. C.
       climate
    4. D.
       appearance
19. 19.
    1. A.
       from
    2. B.
       into
    3. C.
       in
    4. D.
       on
20. 20.
    1. A.
       unbelievable
    2. B.
       dull
    3. C.
       variable
    4. D.
       hidden

Answer 1

CBAAD DADCB DCCAB CACBC