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Man has a big brain. He can think and s   1   languages. Scientists once thought that man isn't the same as
animalsb   2   man can think and learn. They know now that dogs, monkeys and birds can learn, too.
They are beginning to u   3   that men are different from animals because they can speak. Animals can't speak.
They make much n   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 can not join words to make s   5   . They cannot think I   6   
us because they have no language. Language is a wonderful thing. Man has been a   7   to build a modern world
because he has language. Every child can speak his own language very w   8   when he is four or five, b   9   no
animals learn to speak.
How do children learn it? Scientists don't really know w   10   happens inside our body when we speak. They
only know that man can speak because he has a brain.
1. _____ 2. _____ 3. _____ 4. _____ 5. _____
6. _____ 7. _____ 8. _____ 9. _____ 10. _____

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