The population problem 1 the greatest one of the world today．
The 2 population is growing 3 ．Two thousand years 4 , there were only 250 million people on the earth．One thousand six hundred years 5 , the 6 was over 500 million．In 1990,there 7 over five billion．A 8 report 9 that the population of the world had 10 six billion 11 the end of last century．This is just ten years after it 12 five billion．That means that in the coming years there will be 13 only on the earth．There won’t be enough space for 14 ．
完形填空阅读下面短文, 掌握其大意, 然后从各题所给的四个选项(A、B、C和D)中, 选出最佳选项. The population problem __1__ the greatest one in the world today. The __2__ population is growing __3__. Two thousand years __4__, there were only 250 million people __5__ the earth. One thousand six hundred years __6__, the __7__ was over 500 million. In 1990, there __8__ over five billion. A __9__ report __10__ that the world's population will __11__ six billion __12__ the end of this century. This is just ten years after it __13__ five billion. That means that in the coming years there will be __14__ only on the earth. There won't be enough space for __15__.
(1)
A. may be B. maybe C. must D. perhaps be
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(2)
A. world B. worlds C. world's D. worlds'
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(3)
A. fastest B. more fast and fast C. the faster, the faster D. faster and faster
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(4)
A. ago B. before C. then D. later
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(5)
A. in B. on C. living D. for
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(6)
A. after B. then C. later D. late
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(7)
A. people B. count C. person D. number
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(8)
A. was B. were C. are D. is
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(9)
A. UA B. USA C. UN D. UT
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(10)
A. say B. saying C. said D. says
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(11)
A. over B. pass C. more than D. past
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(12)
A. by B. of C. in D. on
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(13)
A. reach B. reached C. got D. get
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(14)
A. stand rooms B. stand room C. standing room D. standing rooms
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(15)
A. nobody else B. else everybody C. anybody else D. else everything