根据短文内容及首字母提示，填写所缺单词.Man has a big brain. He can think and s【小题1】languages. Scientists once

根据短文内容及首字母提示，填写所缺单词.
Man has a big brain. He can think and s 【小题1】 languages. Scientists once thought that man isn’t the same as animals b 【小题2】 man can think and learn. They know now that dogs, monkeys and birds can learn, too.
They are beginning to u 【小题3】 that men are different from animals because they can speak. Animals can’t speak. They make much n 【小题4】 when they are afraid, or unhappy. Apes(猿) can learn some things more quickly than man. One or two of them have learned a few words. But they cannot join w 【小题5】 to make sentences. They cannot think l 【小题6】 us because they have no language. Language is a wonderful thing. Man has been a 【小题7】 to build a modern world because he has language. Every child can speak his own language very w 【小题8】 when he is four or five, b 【小题9】 no animals learn to speak.
How do children learn it? Scientists don’t really know w 【小题10】 happens inside our body when we speak. They only know that man can speak because he has a brain. speak

(答案→)speak 解析：本文叙述了人不同于动物，人会说话而动物不会说话。动物害怕或不高兴时会发出噪音。因为动物没有语言，他们不可能像我们一样思考。科学家也弄不明白当人说话时，人体内部发生了什么。【小题1】与languages.连用，表示说语言。句意：他会思考和说话，故用动词speak。【小题2】句意：科学家曾经认为人脑与动物的大脑不一样，因为人会思考和说话，根据句意前后是因果关系，故用连词because。【小题3】句意：他们开始理解到人不同于动物，因为人会说话。结合句意，此处用动词understand。【小题4】make noise 发出噪音。句意：动物害怕或不高兴时会发出噪音。故此处用名词noise。【小题5】join words to make sentences. 连词成句。句意：但是他们不会连词成句，故此处用名词words。【小题6】根据they have no language. 可知他们没有语言，我们会说话，因此此处指他们不像我们。句意：因为他们没有语言，他们不可能像我们一样思考。故用介词like（像）。【小题7】句意：因为人类有语言，他们能建造一个现代的世界。be able to 能够，会。【小题8】句意:每个孩子四，五岁是说自己的母语说的很好，结合句意，此处用副词well。【小题9】句意：但是动物没有学会说话。前一句说人说自己的母语说的好，后一句说动物不会说话，后世转折关系，故用连词but。【小题10】谓语动词know 后的宾语从句缺少主语，表示事物故用代词what。句意：科学家也弄不明白当人说话时，人体内部发生了什么。

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