2013年职称英语理工类c级阅读理解练习7_第2页

　　31 According to the passage, which of the following is the most important factor causing the rapid extinction of many species since the 17th century?
　　A Human beings are not aware of the importance of preserving endangered species.
　　B Some endangered species have already reached the end of their life span in evolution.
　　C The development of human society has greatly affected natural ecology systems.
　　D The world’s climate has changed greatly that most species cannot survive.
　　32 In the last sentence of the second paragraph, the word “islands” refers to ?
　　A the lands that are completely surrounded by water.
　　B the wild animals’ breeding grounds protected by law.
　　C the pieces of land separated by modern buildings and roads.
　　D the small and isolated areas inhabited by certain species.
　　33 This passage mentions all of the following causes for the extinction of many species EXCEPT ?
　　A natural selection of species.
　　B various natural disasters.

　　C commercial trade and killing.
　　D destruction of natural surroundings.
　　34 According to the passage, which of the following is most important in saving declining species?
　　A Governments should make some laws to protect endangered species.
　　B People should pay more attention to the protection of natural surroundings.
　　C Relevant law must be made and enforced with the support of the people.
　　D Some organizations should warn people not to trade in endangered animals.
　　35 How does the author feel about the prospect of protecting endangered species from being extinct?
　　A Worried.
　　B Optimistic.

　　C Indifferent.
　　D Confident.