2. 外语
  3. A. function B. warning C. definition D. replacing E. express F. words G. deeds

A. function B. warning C. definition D. replacing E. express F. words G. deeds

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问题     A. function        B. warning        C. definition        D. replacing        E. express
    F. words           G. deeds          H. interpret         I. limitless        J. single
    K. boundless       L. general        M. ordinary          N. distinguishes    O. different
    A language is a signaling system which operates with symbolic vocal sounds, and which is used by a group of people for the purpose of communication.
    Let’s look at this【C1】________ in more detail because it is language, more than anything else, that【C2】________ man from the rest of the animal world.
    Other animals, it is true, communicate with one another by means of cries: for example, many birds utter【C3】________ calls at the approach of danger; monkeys utter【C4】________cries, such as expressions of anger, fear and pleasure. But these various means of communication differ in important ways from human language. For instance, animals’ cries do not【C5】________ thoughts and feelings clearly. This means, basically, that they lack structure. They lack the kind of structure that enables us to divide a human utterance into【C6】________.
    We can change an utterance by【C7】________ one word in it with another a good illustration of this is a soldier who can say, e.g., "tanks approaching from the north", and who can change one word and say "aircraft approaching from the north" or "tanks approaching from the west"; but a bird has a【C8】________ alarm cry, which means "danger! "
    This is why the number of signals that an animal can make is very limited: the great tit is a case in point; it has about twenty different calls, whereas in human language the number of possible utterances is【C9】________. It also explains why animal cries are very【C10】________ in meaning.
【C7】
选项
答案D
解析 空格位于介词by后面，且空格后带了名词短语one word，推测空格处需填入动名词。由下文的两个例子看到，都是替换了一个单词改变话语意思，词库中的replacing“代替”符合语境。
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