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【简介】感谢网友“雕龙文库”参与投稿,这里小编给大家分享一些,方便大家学习。

  阅读下面的短文,文中有15处空白,每处空白给出了4个选项,请根据短文的内容从4个选项中选择1个最佳答案。

  Sharks Perform a Service for Earths Waters

  It is hard to get people to think of sharks as anything but a deadly enemy. They are thought to _____51 people frequently. But these fish perform a_____ 52 service for earths waters and for human beings. Yet business and sport fishing are threatening their _____53 Some sharks are at risk of disappearing from_____ 54 。

  Warm weather may influence both fish and shark activity. Many fish swim near coastal areas _____55 their warm waters. Experts say sharks may follow the fish into the same areas, _____56 people also swim. In fact, most sharks do not purposely charge at or bite humans. They are thought to mistake a person _____57 a sea animal, such as a seal or sea lion. That is why people should not swim in the ocean when the sun goes down or comes up. Those are the _____58 when sharks are looking for food. Experts also say that bright colors and shiny jewelry may cause sharks to attack.

  A shark has an extremely good sense of smell. It can find small amounts of substances in water, such as blood, body liquids and _____59 produced by animals. These powerful _____60 help sharks find their food. Sharks eat fish, any _____61 sharks, and plants that live in the ocean.

  Medical researchers want to learn more about the sharks body defense and immune _____62 against disease. Researchers know that sharks _____63 quickly from injuries. They study the shark in hopes of finding a way to fight human disease.

  Sharks are important for the worlds _____64 。 They eat injured and diseased fish. Their hunting activities mean that the numbers of other fish in ocean waters do not become too _____65 This protects the plants and other forms of life that exist in the oceans.

  练习:

  51. A attack B meet C love D visit

  52. A terrible B eatable C valuable D possible

  53. A source B existence C friends D fish

  54. A Space B Sky C Land D Earth

  55. A because B since C because of D by reason that

  56. A whose B which C that D where

  57. A to B for C like D with

  58. A times B places C seas D oceans

  59. A sciences B mathematics C chemicals D physics

  60. A feelings B senses C touches D tastes

  61. A those B these C another D other

  62. A systems B processes C ideas D circles

  63. A recover B reform C return D rely

  64. A rivers B oceans C forests D mountains

  65. A weak B little C few D great

  【参考答案】 ACBDC DBACB DAABD

  

  阅读下面的短文,文中有15处空白,每处空白给出了4个选项,请根据短文的内容从4个选项中选择1个最佳答案。

  Sharks Perform a Service for Earths Waters

  It is hard to get people to think of sharks as anything but a deadly enemy. They are thought to _____51 people frequently. But these fish perform a_____ 52 service for earths waters and for human beings. Yet business and sport fishing are threatening their _____53 Some sharks are at risk of disappearing from_____ 54 。

  Warm weather may influence both fish and shark activity. Many fish swim near coastal areas _____55 their warm waters. Experts say sharks may follow the fish into the same areas, _____56 people also swim. In fact, most sharks do not purposely charge at or bite humans. They are thought to mistake a person _____57 a sea animal, such as a seal or sea lion. That is why people should not swim in the ocean when the sun goes down or comes up. Those are the _____58 when sharks are looking for food. Experts also say that bright colors and shiny jewelry may cause sharks to attack.

  A shark has an extremely good sense of smell. It can find small amounts of substances in water, such as blood, body liquids and _____59 produced by animals. These powerful _____60 help sharks find their food. Sharks eat fish, any _____61 sharks, and plants that live in the ocean.

  Medical researchers want to learn more about the sharks body defense and immune _____62 against disease. Researchers know that sharks _____63 quickly from injuries. They study the shark in hopes of finding a way to fight human disease.

  Sharks are important for the worlds _____64 。 They eat injured and diseased fish. Their hunting activities mean that the numbers of other fish in ocean waters do not become too _____65 This protects the plants and other forms of life that exist in the oceans.

  练习:

  51. A attack B meet C love D visit

  52. A terrible B eatable C valuable D possible

  53. A source B existence C friends D fish

  54. A Space B Sky C Land D Earth

  55. A because B since C because of D by reason that

  56. A whose B which C that D where

  57. A to B for C like D with

  58. A times B places C seas D oceans

  59. A sciences B mathematics C chemicals D physics

  60. A feelings B senses C touches D tastes

  61. A those B these C another D other

  62. A systems B processes C ideas D circles

  63. A recover B reform C return D rely

  64. A rivers B oceans C forests D mountains

  65. A weak B little C few D great

  【参考答案】 ACBDC DBACB DAABD

  

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