2017年職稱英語理工類C級(jí)輔導(dǎo)練習(xí)題(8)
Sharks Perform a Service for Earth’s Waters
It is hard to get people to think of sharks as anything but a deadly enemy1. They are thought to 1 people frequently. But these fish2 perform a 2 service for earth's waters and for human beings. Yet business and sport fishing3 are threatening their 3 Some sharks are at risk of disappearing from 4
Warm weather may influence both fish and shark activity. Many fish swim near coastal areas 5 their warm waters. Experts say sharks may follow the fish into the same areas, 6 people also swim. In fact, most sharks do not purposely charge at or bite humans. They are thought to mistake a person 7 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 8 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 smell4. It can find small amounts of substances in water, such as blood, body liquids and 9 produced by animals. These powerful 10 help sharks find their food. Sharks eat fish, any 11 sharks, and plants that live in the ocean.
Medical researchers want to learn more about the shark’s body defense, and immune 12 against disease. Researchers know that sharks 13 quickly from injuries. They study the shark in hopes of finding a way to fight human disease.
Sharks are important for the world’s 14 . They eat injured and diseased fish. Their hunting activities mean that the numbers of other fish in ocean waters do not become too 15 . This protects the plants and other forms of life that exist in the oceans.
注釋：
1.It is hard to get people to think of sharks as anything but a deadly enemy：要讓人們相信鯊魚不是(人類的)死敵不是一件容易的事。 anything but意為“決不，遠(yuǎn)非”，如： His performance in London is anything but a success.(她在倫敦的演出完全不成功。)
2.these fish：這些魚(指鯊魚)。 fish單復(fù)數(shù)同形，如： one fish，two fish，many fish(見第二段第一句)。
3.sport fishing：捕魚運(yùn)動(dòng)。
4.sense of smell：嗅覺
練習(xí):
1. A attack B meet C love D visit
2. A terrible B eatable C valuable D possible
3. A source B existence C friends D fish
4. A Space B Sky C Land D Earth
5. A because B since C because of D by reason that
6. A whose B which C that D where
7. A to B for C like D with
8. A times B places C seas D oceans
9. A sciences B mathematics C chemicals D physics
10. A feelings B senses C touches D tastes
11. A those B these C another D other
12. A systems B processes C ideas D circles
13. A recover B reform C return D rely
14. A rivers B oceans C forests D mountains
15. A weak B little C few D great
答案與題解：
1.A 本題應(yīng)選擇 attack，因?yàn)榈谝痪湔f到：人們認(rèn)為鯊魚是 a deadly enemy，也就是說鯊魚會(huì)對(duì)人類造成傷害。第二句是對(duì) deadly enemy的具體說明。其他的三個(gè)選項(xiàng) meet，love，visit都不合適， love與上下文意思相反， meet和 visit與上下文意思不符。
2.C 空格 2所在的句子由 but連接，所以該句子表達(dá)的意思一定與第二句相反。第二句對(duì)鯊魚的評(píng)價(jià)是負(fù)面的，填入空格 2的詞應(yīng)該是正面的。四個(gè)選項(xiàng)中只有 valuable符合這一條件，所以是答案。
3.B 第三句說到鯊魚有益于 “waters and human beings”，第五句又說到鯊魚瀕臨滅絕的危險(xiǎn)。根據(jù)上下文的意思，threatening(威脅)到它們的應(yīng)該是 existence(生存)。其他的三個(gè)選項(xiàng) source，friends，fish都不合適，與上下文意思沒有聯(lián)系。
4.D 如果鯊魚消失，從什么地方消失呢 ?當(dāng)然從 earth(地球)上消失。從 space(宇宙空間)、 sky(天空)
中消失，或從 land(陸地)上消失，都有悖常理。
5.C 四個(gè)選項(xiàng)的意思都是 “因?yàn)椤?，但是從用法上分析?because、since和 by reason that之后要接句子， because of之后接名詞或名詞短語。 their warm waters是名詞短語，所以要選用 because of。
6.D “… people also swim”明顯是定語從句，其先行詞是表示地點(diǎn)的名詞 area，所以要選關(guān)系副詞 where。
7.B 從上下文判斷，本句的意思是：鯊魚將人錯(cuò)認(rèn)為是海洋動(dòng)物。而“將……錯(cuò)認(rèn)為是 ”的英語表達(dá)是 mistake … for，所以本題的答案是選項(xiàng) B。