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  Doyouknowwhysomanyanimalsdonotstayinoneplace?Birds,fishandotheranimalsmovefromoneplacetoanotherplaceatacertaintime.Theymovefordifferentreasons:mostofthemmovetofindfoodmoreeasily,butothersmovetogeta

  Do you know why so many animals do not stay in one place?Birds,fish and other animals move from one place to another place at a certain time.They move for different reasons:most of them move to find food more easily,but others move to get away from places that are too crowded.

  When cold weather comes,many birds move to warmer places to find food.Some fishes give birth in warm water and move to cold water to feed.The most famousmigration is probably the migration of fish,which is called“salmon”(鲑鱼).This fish is born in fresh water but it travels many miles to salt water.There it spends its life.When it is old,it will return to its birthplace in fresh water.Then it gives birth and dies.In northern Europe,there is a kind of mouse.They leave their mountain homes when they become too crowded.They move down to the low land.Sometimes they move all the way to the seaside,and many of them are killed when they fall into the sea.

  Recently,scientists have studied the migration of a kind of lobster(龙虾).Every year,when the season of the bad weather arrives,the lobsters get into a long line and start to walk across the floor of the ocean.Nobody knows why they do this,and nobody knows where they go.So,sometimes we know why humans and animals move from one place to another place,but at other times we don’t.Maybe living things just like to travel.

  55.The reason for most of the animals to move is___.

  A.to get away from un-crowded places B.to find their own parents

  C.to want to kill themselves D.to find food more easily

  56.Where does young salmon(鲑鱼) spend its life?___

  A.In fresh water. B.In salt water.

  C.In mountain homes. D.In its birthplace.

  57.When do the lobsters(龙虾) begin to move another place?___

  A.When their homes become too crowded.

  B.When the season of the bad weather arrives.

  C.When they want to give birth.D.When their food is ea

1回答
2020-05-12 21:42
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田树苞

  55:D细节理解题.根据mostofthemmovetofindfoodmoreeasily,可知,大多数迁徙是想更容易地找到食物.故选D.

  56:B细节理解题.根据Thisfishisborninfreshwaterbutittravelsmanymilestosaltwater.Thereitspendsitslife.可知,鲑鱼生活在咸水了.故选B.

  57:B推理判断题.根据Everyyear,whentheseasonofthebadweatherarrives,thelobstersgetintoalonglineandstarttowalkacrosstheflooroftheocean.可知,每年当坏天气的季节到来时,龙虾们就排着队开始横穿海底.故选B.

  58:A词义推测题.根据前后句子This fish is born in fresh water but it travels many miles to salt water.There it spends its life.When it is old,it will return to its birthplace in fresh water.Then it gives birth and dies.可知它们生在淡水,却要跋涉许多英里到咸水里生活.老了再回到出生的淡水区生儿育女,然后死去.故猜测migration的意思是move,迁居、迁徙.故选A.

2020-05-12 21:46:16

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