In the past, man did not have to think about the protection of his environment. There were few people on the earth, and natural resources seemed to be____36____ .
Today things are___37_____, the world has become too___38____ . We are using up our natural resources too quickly, and at the same time we are___39____ our environment with dangerous chemicals. If we continue to do this, human life on the earth ___40____survive.
Everyone___41_____ today that if too many fish are taken from the sea, there will soon be none left. Yet, with modern fishing__42_____ , more and more fish are caught. We know that if too many trees are cut down, ___43____will disappear and nothing will grow on the land. Yet, we ___44_____to use bigger and more powerful machines to __45____more and more trees.
We realize that if rivers are polluted with waste products from factories, we will die.___46_____, in most countries wastes are ___47______put into rivers or into the sea, and there are _48_____laws to stop this.
We know, too, that if the___49____ of the world continues to rise at the present rate, in a few years, there will not be enough___50_____. What can we do to solve these problems ?
It we eat more vegetables and less___51____, there will be more food available for everyone. Land that is used to grow crops __52_____five times more people than land where animals are kept.
Our natural resources will _53_____longer if we learn to recycle them. The world population will not rise so quickly if people use modern methods of birth__54_______ .
Finally, if we educate people to think about the problems, we shall have a better and clearer ___55____in the future.
| 小题1: | | A．beautiful | B．unlimited | C．rare | D．valuable |
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| 小题2: | | A．common | B．the same | C．changeable | D．different |
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| 小题3: | | A．crowded | B．small | C．dirty | D．busy |
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| 小题4: | | A．protecting | B．saving | C．polluting | D．fighting |
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| 小题5: | | A．may not | B．will not | C．shall not | D．could not |
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| 小题6: | | A．wonders | B．realizes | C．consider | D．discovers |
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| 小题7: | | A．poles | B．boats | C．methods | D．ideas |
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| 小题8: | | A．mountains | B．the sea | C．trees | D．forests |
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| 小题9: | | A．continue | B．have | C．ought | D．will go on |
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| 小题10: | | A．grow | B．plant | C．save | D．cut down |
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| 小题11: | | A．Thus | B．However | C．Generally speaking | D．Therefore |
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| 小题12: | | A．still | B．even | C．also | D．certainly |
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| 小题13: | | A．too many | B．a few | C．some | D．few |
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| 小题14: | | A．production | B．pollution | C．population | D．revolution |
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| 小题15: | | A．houses | B．vegetables | C．food | D．lives |
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| 小题16: | | A．fruit | B．meat | C．fish | D．grain |
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| 小题17: | | A．feeds | B．increases | C．supplies | D．helps |
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| 小题19: | | A．control | B．born | C．plan | D．reward |
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| 小题20: | | A．nature | B．sea | C．planet | D．Forest |
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