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
国内英语资讯:China, Zimbabwe agree to establish comprehensive strategic partnership of cooperation
国内英语资讯:Wrong for U.S. to target Chinas manufacturing upgrade
国内英语资讯:China firmly opposes U.S. tariff proposals, counter measures underway
国内英语资讯:Premier Li calls for building clean government
国内英语资讯:Trump should be in agreement with China as economies interdependent: French expert
国内英语资讯:Freight train service linking N China, Mongolia launched
国内英语资讯:China confident, capable in tackling challenges in IPR field: official
国内英语资讯:China calls for EU caution on protective measures
国内英语资讯:Religious extremism notably curbed in Xinjiang: senior Chinese official
国内英语资讯:Feature: Chinese aid brings smiles to faces of flood victims in Nepals Terai region
体坛英语资讯:Former Brazil striker Fred suffers knee injury
国内英语资讯:China congratulates Cuba on election of new president: FM
国内英语资讯:BFA annual conference concludes with globalization consensus
国内英语资讯:Chinas top political advisor calls for advancing CPC-led multiparty cooperation
国内英语资讯:Xinhua Headlines: Xi outlines blueprint to develop Chinas strength in cyberspace
国内英语资讯:China to use more prefab buildings in military
国内英语资讯:Xi-Modi meeting a new milestone, experts say
国内英语资讯:Chinese air force releases promotional video recapping island patrols
国内英语资讯:Premier Li urges Shanghai to further improve business environment
国内英语资讯:Top political advisor calls for joint efforts to advance peaceful reunification of motherlan
国内英语资讯:China releases rules to open securities sector to foreign investors
国内英语资讯:China sees 100 mln domestic tourist trips during tomb-sweeping holiday
体坛英语资讯:Fernandinho set for Brazil return against Germany
英语美文:比智商更重要的能力是逆商
国内英语资讯:Chinese premier vows to deepen reform, opening up
国内英语资讯:Senior CPC official inspects poverty relief work
国内英语资讯:Anti-graft chief urges supervision over all state functionaries
国内英语资讯:Top political advisor asks for improvements to consultation sessions
国内英语资讯:China encourages generic drug production amid increased regulation
为什么每天走一万步就能治好癌症呢
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |