课件56张PPT。Inventors and inventionsUnit 3 Words and Their Stories:Grapevine（词汇掌故：小道消息） The American inventor,Samuel F.Morse,is largely responsible for the birth of the expression.Among others,he experimented with the idea of telegraphy—sending messages over a wire by electricity.When Morse finally completed his telegraphic instrument,he went before Congress to show that it worked.He sent a message over a wire from Washington to Baltimore.The message was,“What hath God wrought?” This was on May twenty-fourth,eighteen forty-four.Quickly,companies began to build telegraph lines from one place to another.Men everywhere seemed to be putting up poles with strings of wire for carrying telegraphic messages.The workmanship was poor and the wires were not put up straight. Some of the results looked strange.People said they looked like a grapevine.A large number of the telegraph lines were going in all directions,as crooked as the vines that grapes grow on.So was born the expression,by the grapevine.Some writers believe that the phrase would soon have disappeared were it not for the American Civil War. Soon after the war began in 1861,military commanders started to send battlefield reports by telegraph.People began hearing the phrase by the grapevine to describe false as well as true reports from the battlefield.It was like a game.Was it true? Who says so? Now,as in those far?off Civil War days,getting information by the grapevine remains something of a game.A friend brings you a bit of strange news.“No,” you say,“it just can't be true! Who told you?” Comes the answer,“I got it by the grapevine.” You really cannot know how much—if any—of the information that comes to you by the grapevine is true or false.Still,in the words of an old American saying,the person who keeps pulling the grapevine shakes down at least a few grapes.Section Ⅰ Warming Up and Reading 栏目导航Ⅰ.Read the text and match the main idea with each paragraph. Part Ⅰ（Para.1）： （ ）A.The discovery of the problem of the snakes. Part Ⅱ（Para.2~3）：（ ）B.The requirement of getting a patent. Part Ⅲ（Para.4~6）：（ ）C.The research on the approaches to solve the problem. Part Ⅳ（Para.7~8）：（ ）D.The attempts to catch the snakes.ACDBⅡ.Scan the text and choose the best answer according to the text. 1.The purpose of the text is_____ . A.to show us how to trap the snakes without killing them B.to tell people how to apply for a patent of the writer's new idea C.to introduce the writer's new idea of trapping the snakes and her application for a patent D.to tell the readers how to get a new idea and make it a patent 答案：C 2.The writer was successful to catch the snakes in_____ . A.the third attempt B.the second way C.the first try D.every method 答案：A 3.How did the writer catch the snakes? A.Using something the snakes were interested to attract them into a trap. B.Taking their habitat to another place. C.Placing the snakes at low temperature for them to sleep and ... ...
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