2. 外语
  3. The tropical rain forest belt extending around our planet at the equator(赤道) has taken some 60 million years to evolve to its pr

The tropical rain forest belt extending around our planet at the equator(赤道) has taken some 60 million years to evolve to its pr

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问题     The tropical rain forest belt extending around our planet at the equator(赤道) has taken some 60 million years to evolve to its present state. It is, quite simply, the most complex and the most important ecosystem(生态系统) 【S1】______ earth.
    Homo Faber, Man the Builder, has tragically always seen the jungle 【S2】______ an enemy, an environment 【S3】______, replaced with his own constructions. In the 【S4】______ twenty years the rate of destruction has increased alarmingly 【S5】______ huge areas of green, beautiful forest—an irreplaceable treasure house of living things—has given 【S6】______ to wasteland. The evidence is that man will redouble 【S7】______ destructive efforts until the forest system is smashed, and the jungle will 【S8】______ no more.
    Many experts predict the tropical rain forests will finally 【S9】______ around the end of our 【S10】______. Well done, 20th century.

           Word Bank:
A. or                  I. function
B. vanish              J. way
C. century             K. their
D. his                 L. on
E. use                 M. and
F. as                  N. in
G. defeated            O. past
H. verify
选项
答案L
解析 由earth可知“热带雨林是地球上(on earth)最复杂和最重要的生态系统”，故选L。
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