2. 外语
  3. If an animal is moved from its home in the tropics (热带地区) to a cold climate, it will die if it is not kept warm. And animals【C1】

If an animal is moved from its home in the tropics (热带地区) to a cold climate, it will die if it is not kept warm. And animals【C1】

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问题     If an animal is moved from its home in the tropics (热带地区) to a cold climate, it will die if it is not kept warm. And animals【C1】________to cold climates will die if they are moved to the tropics. Many plants, too, will die if they are removed from the place where they【C2】________grow and are transplanted (移植) into an unfamiliar soil. Almost every species is adapted to life in a particular place by its organs and their functions and by【C3】________habits. The specialized adaptation has great advantages, for it【C4】________many organisms to survive under different conditions. It also has disadvantages, for it means that the life of most species is controlled by【C5】________conditions.
    Living things are not【C6】________over the earth freely; most species have definite habits for living places. Ecology is the study of how organisms live in their environment This means finding out how an organism survives and【C7】________in certain surroundings. By environment we mean not only the soil and the climate but the living things of the same species and other species, plant or animal Most living things are【C8】________to their environment Some can【C9】________certain features of their environment to suit themselves; a beaver (海狸), for example, can make ponds by building dams, many birds and insects can build elaborate nests to provide【C10】________for their young. But these skills are restricted and highly specialized. Most organisms must adapt their bodies to fit in with their surroundings, and since they can adapt only for particular surroundings, they are found only in places where they can live successfully with the least effort.
    A)  normally     E) scattered    I) reproduces   M) enables
    B)  shelter      F) abundant     J) permanent    N) alternative
    C)  assigned     G) surely       K) slaves       O) local
    D)  accustomed   H) alter        L) approach
【C8】
选项
答案K
解析 此处可能需要形容词或名词，作are的表语；也可能需要动词分词与are一起构成完整谓语。前文第1段最后一句提到大部分物种的生命受制于环境，此句属于前文的复现，所填词应与第1段最后一句中的controlled同义，词库中只有slaves可表达这个意思。
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大学英语四级

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