2015年职称英语考试(理工类)完形填空专练(2)

　　Sharks Perform a Service for Earths 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 earths 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 sharks 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 worlds____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.

　　注释：

　　1.It is hard to get people to think of sharks as anything but a deadly enemy：要让人们相信鲨鱼不是死敌不是一件容易的事。anything but意为决不，远非，如：His performance in London is anything but a success.

　　2.these fish：这些鱼。Fish单复数同形，如：one fish, two fish, many fish。

　　3.sport fishing：捕鱼运动

　　4.sense of smell：嗅觉

　　练习：

　　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