九上U4T2SD

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,Unit 4 Amazing Science,Topic 2,When was it,invent,ed?,Section D,Read and,discuss,the following question,s,.,1.,What would you do if you lose your way in,a forest?,2.,How did the early explorers know where,they were?,3.,What is GPS?Is it useful to us?,4.,What do you think GPS will be used for in,the future?,Have you ever got lost somewhere?What method did you use to find your direction?,Where are we?,（影片）,Read and answer the question.,A thief stole a beautiful cellphone from a young girl.He ran away very quickly and then hid in a secret place.To his surprise,when he was using the cellphone,he was caught by the police.Do you know why,What is GPS?,GPS,即全球定位系统,(GlobalPositioningSystem),，简单地说，这是一个由覆盖全球的,24,颗卫星组成的卫星系统。这个系统可以保证在任意时刻，地球上任意一点都可以同时观测到,4,颗卫星，该观测点可以通过接收到的信号,计算出经纬度和高度，以便实现导航、,定位、授时等功能。这项技术可以用,来引导飞机、船舶、车辆以及个人，,安全、准确地沿着选定的路线，准时,到达目的地。,疑难讲解,1.in direction,按,/,朝,方向,e.g.A motor bike hit a truck in the opposite direction.,2.work well,奏效；起作用,e.g.The medicine worked well.,3.as long as,只要；,长达,e.g.You can go out to play as long as you finish your homework.,e.g.I have taught English as long as nine years.,1.,它是由什么制成的？,Whats it made of/from?,2.,我希望有一天我也能飞到太空。,I wish I could go into space some day.,3.,我希望你的梦想能实现。,I hope your dream will come true.,4.,众所周知，大多数生物体内都有,DNA,，包括人。,As we know,there is DNA in most living things,including human beings.,5.,没有人确切地知道，但是大多数人认为机器人会成为我们生活的一部分。,No one knows for certain,but most people think robots will be part of our lives.,6.,总而言之，这个机器人对我们很有帮助。,In short,this robot is very useful to us.,看谁能根据中文意思快速翻译六个句子。,口语比拼,2a,Grammar focus,Passive voice(),The radio was invented by Guglielmo Marconi,in 1895.,When was it developed?,Where was it developed?,Where were laptops invented?,Around 1998.,It was developed in Korea.,They were invented in Japan.,（录音）,2b,Useful expressions,Whats it made of/from?Its made of/from.,I wish I could go into space some day.,I hope your dream will come true.,There is DNA in most living things,including human beings.,No one knows for certain,but most people think that robots will be part of our lives.,（录音）,Passive voice,被动语态,was/were+done,考点探究,()1.A big supermarket _in our city last year.,A.is built B.were built C.was built,()2.Could you tell me who the radio _ by?,A.invents B.invented C.was invented,()3.Many trees and flowers _ in our school last year.,They made our school more beautiful.,A.have planted B.were planted C.planted,()4.The children _ swim last month and they can swim,very well now.,A.are taught B.were taught C.were taught to,()5.It is said that potato chips _by mistake about one,hundred years ago.,A.were invented B.invented C.are invented,C,B,C,A,C,Grammar focus,被动语态综合练习,一、用所给词的适当形式填空。,1.You are late,all the tickets _(sell)out an hour ago.,2.This type of cellphone _(make)in Shenzhen.,3.The story _(happen)in a magic land.,4.Her homework _(finish)yet,so she,is still working on it now.,5.When _ the sports meeting _(hold)?,6.Look,a new road _(build)in that area.,7.The dirty clothes must _(wash)at once.,8.The roses _(smell)sweet.,9.It is well _(know)that the Great Wall is the symbol,of China.,were sold,were made,happened,hasnt been finished,will be held,is being built,be washed,smell,known,be,的某一时态形式,+,v.,的过去分词,二，将下列句子改为被动语态。,1.People use radios to learn English in the past.,_,2.Jack will show me the photo.,_,3.They have raised much money for the Project Hope.,_,4.I often hear Mary sing English songs at home.,_,5.We mustnt throw litter about.,_,6.A policeman is running after a thief in the street.,_,7.People can visit planets like Mars.,_,Radios were used to learn English in the past.,The photo will be shown to me./I will be shown the photo by Jack.,Much money has been raised for the Project Hope.,Mary is often heard to sing English songs at home.,Litter mustnt be thrown about.,A thief is being ran after in the street.,Planets like Mars can be visited.,三，单项选择。,()1.Hurry up,you _ on the phone.,A.WantedB.was wantedC.are wanted,(,)2.Some stories _the children by the teacher,everyday.,A.is told forB.are told forC.are told to,()3._that he has studied abroad for five years.,A.It is saidB.It saysC.That is said,()4.The window _ five minutes ago.,A.is cleanedB.was cleanedC.can be cleaned,()5.The children _by the teachers at school.,A.take care of B.are taken careC.are taken care of,C,C,A,B,C,()6.I have no idea what _while I was asleep.,A.happenedB.was happenedC.happens,()7.In some countries,tea _before meals.,A.is servingB.is servedC.served,()8.This kind of books _well.,A.doesnt sellB.isnt sellingC.arent sold.,()9.I _ten minutes to decide which sentence was,right by the teacher.,A.gaveB.was givenC.was giving,()10.Teachers _in every part of the world.,A.are needingB.are neededC.will need,A,B,A,B,B,Practice makes perfect.,一、词汇：,A,根据所给英汉提示写出单词。,1.What are these _(,牙刷）,made of?,2.A team from UK were the first to _(,克隆）,an animal,successfully.,3.The light bulb is one of Edisons _(,发明,).,4.Would robots like to be human beings _(,佣