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  3. The destruction of habitats (栖息地) all over the world is the primary reason species are becoming extinct (灭绝) or endangered. Hous

The destruction of habitats (栖息地) all over the world is the primary reason species are becoming extinct (灭绝) or endangered. Hous

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问题    The destruction of habitats (栖息地) all over the world is the primary reason species are becoming extinct (灭绝) or endangered. Houses, highways, dams, industrial buildings, and ever-spreading farms now dominate【C1】______formerly occupied by forests, deserts, and wetlands. 【C2】______the beginning of European settlement in America, 【C3】______, over 65 , 000, 000 acres of wetlands have been drained. One million acres alone vanished【C4】______1985 and 1995.
   Habitat destruction can be【C5】______or it can be subtle, occurring over a【C6】______period of time without being noticed. 【C7】______such as sewage from cities and chemical runoff fromfarms, can change the【C8】______and quantity of water in streams and rivers. To【C9】______living in a delicately balanced habitat, this disturbance can be as【C10】______as the clear-cutting of a rainforest.
   【C11】______remaining habitats are carved into smaller and smaller pockets or islands, remaining species are forced to exist in these【C12】______areas, which causes further habitat【C13】______. These species become less adaptable to environmental【C14】______ : in fact, they become【C15】______endangered. Scientists believe that when a habitat is cut by 90% , one-half of its plants, animals and insects will become extinct.
【C1】
选项 A、landscapes
B、cities
C、maps
D、pictures
答案A
解析 空格后所说的森林、沙漠和湿地都是陆地上的风景、风貌，这里是说森林、沙漠和湿地都被房屋、公路、水坝、工业建筑、农场代替了。landscapes有“风景”的意思，符合题意。cities意为“城市”，maps意为“地图”，pictures意为“图画，照片”。
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