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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) |
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A. may be B. maybe C. must D. perhaps be |
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(2) |
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A. world B. worlds C. world's D. worlds' |
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(3) |
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A. fastest B. more fast and fast C. the faster, the faster D. faster and faster |
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(4) |
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A. ago B. before C. then D. later |
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(5) |
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A. in B. on C. living D. for |
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(6) |
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A. after B. then C. later D. late |
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(7) |
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A. people B. count C. person D. number |
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(8) |
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A. was B. were C. are D. is |
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(9) |
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A. UA B. USA C. UN D. UT |
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(10) |
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A. say B. saying C. said D. says |
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(11) |
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A. over B. pass C. more than D. past |
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(12) |
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A. by B. of C. in D. on |
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(13) |
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A. reach B. reached C. got D. get |
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(14) |
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A. stand rooms B. stand room C. standing room D. standing rooms |
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(15) |
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A. nobody else B. else everybody C. anybody else D. else everything |
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