In the great majority of animals , their particular ways of acting in a new environment are a compound (复合体) of individual experience added to the action patterns animals are born with .That is why animals can survive .

　　1．The animal’s life will come to an end_____.

　　       A．if the animal makes a wrong decision B．if the animal plays a dangerous game

　　       C．when the animal attacks its enemy    D．when the animal runs too slowly

　　．Very few species depend entirely on genetic learning because_____.

　　       A．each generation has its own way of learning

　　       B．their environments change all the time

　　       C．they can act reasonably on their own

　　       D．it takes their whole life to learn

　　3．When the environment doesn’t change much ,_____.

　　       A．animals cannot act in a right way

　　       B．genetic learning is less important for animals

　　       C．individual learning plays a less important role

　　       D．animals cannot get over problems on their own

　　4．Animals’ living on generation after generation depends on_____.

　　       A．their natural action pattern with their own experience

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