014-完形填空-第十四篇 鲨鱼有益于地球水系

第十四篇鲨鱼有益于地球水系

+第十四篇Sharks Perform a Service for Earth's Waters

要让人们相信鲨鱼不是人类的死敌不是一件容易的事。人们认为鲨鱼经常袭击人类。但鲨鱼在为地球水系和人类做着有价值的贡献。商业和捕鱼运动仍在威胁着他们的生存，有些鲨鱼面临着从地球上消失的危险。

It is hard to get people to think of sharks as anything but a deadly enemy. They are thought to attack people frequently. But these fish2 perform a valuable service for earth’s waters and for human beings. Yet business and sport f ishing3 are threatening their existence. Some sharks are at risk of disappearing from Earth.

1. A.attack B.meet C. love D.vísít

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

1. A 本题应选择attack，因为第一句说到：人们认为鳖鱼是a deadly enemy ，也就是说鲨鱼会对人类造成伤害。第二句是对deadly enemy 的具体说明。其他三个选项meet，love, visit都不合适，love与上下文意思相反，meet和isit 与上下文意思不符。

2. C 空格2所在的句子由but 连接，所以该句表达的意思一定与第二句相反。第二句对鳖鱼的评价是负面的，填入空格2的词应该是正面的。四个选项中只有valuable符合这一条件，所以是答案。

3. B 第三句说到鳖鱼有益于"waters and human beings" ，第五句又说到整鱼濒临灭绝的危险。根据上下文的意思，threatening 〔威胁〕到它们的应该是existence〔生存〕。其他三个选项source，friends , fish 都不合适，与上下文意思没有联系。

4. D 如果鳖鱼消失，从什么地方消失呢?当然从earth〔地球〕上消失。从space 〔宇窗空间〕、sky〔天空〕中消失，或从land〔陆地〕上消失，都有悖常理。

温暖的气候影响着鱼类和鲨鱼的活动。由于水温变暖，很多鱼类游到海边。专家认为鲨鱼跟随其他鱼类，也来到人类游泳的区域。实际上鲨鱼并非故意袭击

人类。人们认为，由于鲨鱼将人错认为是海狮等海洋动物，在饥饿时才袭击人类。日出和日落时，正是鲨鱼饥肠辘辘的时候，人们不应该出海游泳。专家还提到鲜艳的色彩和闪光的珠宝也会诱使鲨鱼袭击。

Warm weather may influence both fish and shark activity. Many fish swim near coastal areas because of their warm waters. Experts say sharks may follow the fish into the same areas ,where people also swim. In fact , most sharks do not purposely charge at or bite humans. They are thought to mistake a person for 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 times when sharks are looking for food. Experts also say that bright colors and shiny jewelry may cause sharks to attack.

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

5. C 四个选项的意思都是“因为”，但是从用法上分析，because, since和by reason that 之后要接句子，because of 之后接名词或名词短语。Thie warm waters 是名词短语，所以要选用because of。

6. D "... people also swim" 明显是定语从句，其先行词是表示地点的名词area ，所以要选关系副词where 。

7. B 从上下文判断，本句的意思是:鳖鱼将人错认为是海洋动物。而“将……错认为是”的英语表达是mistake . . . for，所以本题的答案是选项B 。

8. A 本段的意思是：鲨鱼并非故意袭击人类。人们认为，由于鲨鱼将人错认为是海狮等海洋动物，在饥饿时才袭击人类。日出和日落时，正是鲨鱼饥肠辘辘的时候，人们不应该出海游泳。空格8 填人的词应该与时间有关，所以times 是答案，而与地点有关的选项〔places，seas 和oceans〕与上下文意思脱节。

鲨鱼的嗅觉特别灵敏，能嗅到海水中存在的极为微量的气味，比如血液、体液和动物散发的化学物质。灵敏的嗅觉有助于鲨鱼找到食物。鲨鱼以鱼、其他鲨鱼和海洋植物为生。

A shark has an extremely good sense of smell.It can find small amounts of substances in water,such as blood, body liquids and chemicals produced by animals.