2. 外语
  3. Since life began eons ago, thousands of creatures have come and gone. Some, such as the dinosaurs, became extinct due to natural

Since life began eons ago, thousands of creatures have come and gone. Some, such as the dinosaurs, became extinct due to natural

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问题     Since life began eons ago, thousands of creatures have come and gone. Some, such as the dinosaurs, became extinct due to naturally changing ecologic conditions. More recent threats to life forms are humans and their activities. Man has drained marshes, burned prairies, dammed and diverted rivers. Some of the more recent casualties of man’s expansion have been the dodo, great auk, passenger pigeon, Irish elk, and Steller’s sea cow. Sadly, we can no longer attribute the increasing decline in our wild animals and plant species to "natural" processes. Many species are dying out because of exploitation, habitat alteration or destruction, pollution, or the introduction of new species of plants and animals to an area. As mandated by Congress, protecting endangered species, and restoring them to the point where their existence is no longer jeopardized, is the primary objective of the U.S. Fish and Wildlife Service’s Endangered Species Program.
According to this passage, ______.
选项 A、man is the cause of some animal extinction
B、animals often bring about their own extinction
C、Congress can absolutely end extinction of animals
D、a law is more important than human responsibility
答案A
解析 文中提到More recent threats to life forms are humans and their activities…Some of the more recent casualties of man’s expansion have been the dodo，great auk，passenger pigeon，Irish elk，and Steller’s sea cow，各种生物近期遇到的威胁更多来自于人类。……近期人类扩张所造成的一些受害者有：渡渡鸟、大海雀、候鸽、受尔兰麋鹿及Steller’s海象。因此根据本文，我们能推断出人类是造成某些动物灭绝的原因，所以A是答案。
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