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 ____21____ formerly occupied by forests, deserts, and wetlands. ____22____ the beginning of European settlement in America, ____23____ , over 65, 000, 000 acres of wetlands have been drained. One million acres alone vanished ____24____ 1985 and 1995.
Habitat destruction can be ____25____ or it can be subtle, occurring over a ____26____ period of time without being noticed. ____27____ such as sewage from cities and chemical runoff from farms, can change the ____28____ and quantity of water in streams and rivers. To ____29____ living in a delicately balanced habitat, this disturbance can be as ____30____ as the clear-cutting of a rainforest.
____31____ remaining habitats are carved into smaller and smaller pockets or islands, remaining species are forced to exist in these ____32____ areas, which causes further habitat ____33____ . These species become less adaptable to environmental ____34____ in fact, they become ____35____ endangered. Scientists believe that when a habitat is cut by 90%, one-half of its plants, animals and insects will become extinct.
Although small sections of the memoirs have been previously published, the autobiography has never been available in full, and should provide great insights into the man behind the classic books. The first volume of the set will be available in November,
According to Paragraph 1, which of the following statements is TRUE of Mark Twain?
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