2. 外语
  3. Both botany(植物学)and zoology are parts of a more general field of science, biology. The two are studies of【C1】______things, which

Both botany(植物学)and zoology are parts of a more general field of science, biology. The two are studies of【C1】______things, which

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问题     Both botany(植物学)and zoology are parts of a more general field of science, biology. The two are studies of【C1】______things, which share certain characteristics,【C2】______they are plants or animals. Botany deals with plants,【C3】______organisms that can manufacture their own【C4】______by the use of sunlight.【C5】______, on the other hand, deals with animals, those organisms that cannot manufacture their own food and are【C6】______dependent on plants for their food.
    Plants and animals【C7】______many abilities, but the extent【C8】______which plants can exercise some of those abilities is【C9】______.  For example, both plants and animals need food, water, and warmth for growth, but plants can【C10】______to acquire those needs only by the slow【C11】______of their leaves and roots,【C12】______animals can move large distances in relatively【C13】______time.  When an animal is hurt with a needle, the animal will【C14】______the part of the body being【C15】______. This ability to draw back【C16】______pain or irritation, called irritability, is【C17】______only to a very limited extent in plants.
    If plants have the same【C18】______and irritability as animals, animals would have a more difficult time finding food.  If animals were as limited as plants, they might have evolved a【C19】______of manufacturing their own food, as plants d9 now.  The world would be a very difficult place than it is if the characteristics of the plants and animals were【C20】______.
【C3】
选项 A、whose
B、which
C、what
D、those
答案D
解析 逻辑衔接题。可以考虑在此处填入一个关系代词，但填入关系代词whose之后会发现并不合适，whose organism并不能代指其先行词plants，句中plants与organism为并列关系，因此此处只能选择指示代词 those，同时结合上下文也可发现该选项为正确选项。在完成完形填空的过程中，需要结合上下文中的内容，很多时候许多有价值的信息在上下文中会直接出现，因此在做题前，通读全文非常有必要。
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