When the environment doesn’t change much , _____ .

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• 1Very 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

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• 2The 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

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• 3In the last paragraph , the writer implies that there is a long way to go _____ .

  A.for a robotic vehicle to finish a 142-mile race without any difficulties

  B.for a little child who has just learned to walk to reach the cookie on the table

  C.for a robotic vehicle to deal with a simple problem that a little child can solve

  D.for a little child to understand the importance of wiping apple juice off its face

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• 4In the race , the greatest distance one robotic vehicle covered was _____  .

  A.about eight miles

  B.six miles

  C.almost two miles

  D.about one mile

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• 5From the passage we know “robotic vehicles” are a kind of machines that _____ .

  A.can do effortlessly whatever tasks living thing can

  B.can take part in a race across 142 miles with a time limit

  C.can show off their ability to turn themselves upside down

  D.can move from place to place without being driven by human beings

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• 6Animals’ living on generation after generation depends on _____  .

  A.their natural action pattern with their own experience

  B.the lessons they have learnt during their lifetime

  C.their experience in particular environments

  D.the knowledge passed on by their parents

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