Period 1Period 1Module 4 Great ScientistsIntroduction Reading & VocabularyIntroduction-1 Brainstorm(5ms) What great What great scientists do you know?scientists do you know?Name: _Nationality: _Major: _Inventions /discovers: _When did they invent/discover:_QianQian XuesenXuesenChineseChinesePhysicsPhysicsChinese atom bombIn 1964Name: _Nationality: _Major: _Inventions /discovers: _When did they invent/discover:_Marie CuriePolishPhysicsRadioactivityIn 1898Name: _Nationality: _Major: _Inventions /discovers: _When did they invent/discover:_ArchimedesSicilianPhysics, Mathematicianbuoyancy浮力浮力About 240 BCName: _Nationality: _Major: _Inventions /discovers: _When did they invent/discover:_Albert EinsteinGerman / AmericanMathematical Physicsrelativity In 1905Name: _Nationality: _Major: _Inventions /discovers: _When did they invent/discover:_Yuan LongpingChineseAgriculturehybrid riceIn 1970Introduction-2. Vocabulary (4ms) Find out the Find out the words with their definitions.words with their definitions.1. the study of animals2. the study of plants3. the study of all living things4. the study of physical objects and natural forces5. the study of chemical processes in living things6. the study of the structure of substance and how they react with each other7. the study of inherited characteristics in living thingszoologybotanybiologyphysicsbiochemistrychemistrygeneticsIntroduction-2. Vocabulary (4ms) How do we call How do we call the persons who study these subjects?the persons who study these subjects?biologychemistrybiochemistrybotanyzoologygeneticsphysics mathematicsbiologistchemistbiochemistbotanistzoologistgeneticistphysicistmathematicianReading & Vocabulary-1. Pre-reading (4ms) LookLookat the title and guess what it is about.at the title and guess what it is about.The Student Who Asked Questions1. Will the passage be about something or about someone?2. Do you think that the writer wrote about how the student studied in school? Did the writer write about what he did when he grew up? Why?Reading & Vocabulary -2. Skimming(7ms) Read the passage and find out the answers to the Read the passage and find out the answers to the questions.questions.1.What kind of student was Yuan Longping when he was young?2.What way did he think to produce rice more quickly?3.What did he discover?4.How important was the discovery？1.1.What kind of student was Yuan Longping when he What kind of student was Yuan Longping when he was young?was young?2. What way did he think to produce rice more 2. What way did he think to produce rice more quickly?quickly?3. What did he discover?3. What did he discover?He was a student with lots of questions and he was interested in plants. By crossing different species of rice plant, then he could produce a new plant which could give a higher yield than either of the original plants.He discovered a naturally sterile male rice plant.4. How important was the discovery？ Chinese rice production rose by 47.5% in the 1990s. There were other advantages. 50,000 square kilometres of rice fields were converted to growing vegetables and other cash crops. Yuans rice was exported to other countries. His rices yield is much greater than the yield of other types of rice grown in Pakistan.Reading & Vocabulary - 3. Careful reading (5ms) Read the passage again and decide whether the Read the passage again and decide whether the statements are True of False.statements are True of False.1. China produces more rice than any other country.2. Yuan Longping asked a lot of questions at school.3. He developed a new kind of fast-growing rice.4. The government helped him in his research.5. The new rice replaced vegetables in 50 thousand square kilometers.6. The new rice is now grown n other countries, such as Pakistan.Reading & Vocabulary -3. Structure(5ms) Find Find out the topic sentences.out the topic sentences.Para 1Para 2Para 3Para 4Para 5Para 6Yuan Longping is a leading figure in the rice-growing world.Yuan Longping is a leading figure in the rice-growing world.As a boy, he was called “the student who asked questions”.As a boy, he was called “the student who asked questions”.As a young teacher, he began experiments in crop breeding.As a young teacher, he began experiments in crop breeding.He discovered a special type of rice.He discovered a special type of rice.His discoveries increased Chinese rice production.His discoveries increased Chinese rice production.The yield of the new hybrid rice is much greater than that ofThe yield of the new hybrid rice is much greater than that ofother types grown in Pakistan.other types grown in Pakistan.Reading & Vocabulary -3. Vocabulary (6ms) Finish the exercises in Activity 3 & 4.Finish the exercises in Activity 3 & 4.Activity 3: 1)crop2)breakthrough3)breed4)support5)feed6)publish7)producer8)species9)agriculture Activity 4:1)B2)B3)A4)B5)BPost-reading-4. Role-play (5ms) Suppose one of you is an experienced farmer whohas been growing rice; One is professor Yuan and the other one is a reporter. Please talk about the influence of the new hybrid rice. Figures Figures In the pastIn the pastNowadaysNowadaysIn the futureIn the futureThe farmerThe farmerProf. YuanProf. YuanTips:Homework Try to find some information about Try to find some information about the influence of the hybrid rice. Then the influence of the hybrid rice. Then share it with the classmates tomorrow.share it with the classmates tomorrow.Period 2Period 2Module 4 Great ScientistsListening and Speaking Listening & Speaking-1.Discussion(5ms) Listening & Speaking-1.Discussion(5ms) Look at the Look at the picture in your textbook and answer.picture in your textbook and answer.What is happening in the picture?What do you think the listening text is about?Theres a quiz show being on.quiz: a competition or game in which people try to answer questions to test their knowledgeListening & Speaking -2.Vocabulary (5ms) Listening & Speaking -2.Vocabulary (5ms) Match the Match the words with the meanings. words with the meanings. awardequalmeasurediscovertheoryradiationcontestantround1. 1. a prize or money given to someone for sth a prize or money given to someone for sth 2. exactly the same2. exactly the same3. to find out how long, wide, heavy, etc. sth is3. to find out how long, wide, heavy, etc. sth is4. to find4. to find5. an idea, esp. in science, that explains why or how 5. an idea, esp. in science, that explains why or how sth happens sth happens6. a form of energy which comes from a nuclear 6. a form of energy which comes from a nuclear reaction reaction 7. a person who takes part in a contest 7. a person who takes part in a contest 8. a stage in a competition8. a stage in a competitionListening & Speaking -3. Listening (5ms) Listening & Speaking -3. Listening (5ms) Listen and find Listen and find out the following answers .out the following answers .1 1Whats the name of the quiz show?Whats the name of the quiz show?2 2What round of the quiz is it?What round of the quiz is it?3 3What is the subject of this round?What is the subject of this round?4 4Who are the contestants?Who are the contestants?5 5How many questions are there in this round?How many questions are there in this round?6 6How many points have they got before / after this How many points have they got before / after this round?round?Superquiz.The second round.Great Scientists.Matthew and Rachel.12.36:36.39:41.Listening & Speaking -4.Filling (6m) Listening & Speaking -4.Filling (6m) Listen to the Listen to the tape again, then finish the exercise in Activity 3, on tape again, then finish the exercise in Activity 3, on page 36.page 36.Answers:bornpublishedgivenfamous forholediscovered, holesholes measuredListening & Speaking -5.Extra-listening Listening & Speaking -5.Extra-listening Listen to the Listen to the tape again ,then fill in the blanks.tape again ,then fill in the blanks.Q.M: Boys and girls, were into the second round of Q.M: Boys and girls, were into the second round of “Superquiz”, and the subject of this round is “Superquiz”, and the subject of this round is “Great Scientists”. In this round, the first person “Great Scientists”. In this round, the first person to answer the question_. If hes to answer the question_. If hes wrong,he _ a point, and the wrong,he _ a point, and the question_. At the question_. At the moment, Matthew and Rachel are _, with moment, Matthew and Rachel are _, with 36 points each. 36 points each. First question: What is Einstein known for? First question: What is Einstein known for?(buzzer)(buzzer)M: _.M: _.gets a pointgoes to the second contestant losesequalThe theory of relativityQ.M: Correct. When was Einstein born?(buzzer)M: 10.Q.M: Wrong. Rachel?R: 1879?Q.M: Correct. The special theory of relativity _in 1905. _?(buzzer)M: Einstein.Q.M: Correct. Einstein was given an important award in 1921. _?was publishedWho was it written byWhat award was he given(buzzer)M: Was he given the Nobel Physics Prize?Q.M: Yes, he was. Well done. Next question: What book is Stephen Hawking famous for?(buzzer)R: “_.”Q.M: Correct. When was it published?(buzzer)R: 1988.Q.M: Correct. What is a “_”?A Brief History of Timeblack hole(buzzer)M: Its a star that has collapsed in on itself.Q.M: Correct. Who discovered black holes?(buzzer)M: They _Einstein.Q.M: No, they were not discovered by Einstein, they were discovered by Fred Hoyle. _? (silence) Rachel?R: Pass.Q.M: Matthew?M: Theyre measured by the _ that come from them.How are black holes measuredwere discovered bylight wavesQ.M: Wrong, they arent measured by light waves, theyre measured by the radiation that comes from them._ _?(buzzer)R: Stephen Hawking?Q.M: _! They were discovered by Stephen Hawking. Theyre called the Hawking radiation. Now, Stephen Hawking _another reason. Does anyone know? Who was this radiation discovered byWell doneis famous for(buzzer)M: He cant walk and he cant talk except with a machine.Q. M: _. Do you know the name of the his disease?(buzzer)R: Motor neuron disease. He sits in a _ _ and he speaks _ _.Q.M: Correct. And at the end of this round Matthew has thirty-nine points and Rachel has forty-one points!Thats correctspecialthrough avoice machinewheelchairCulture corner -1.Brainstorm (5ms)Culture corner -1.Brainstorm (5ms)RocketsCulture corner -2. Skimming (5ms) Culture corner -2. Skimming (5ms) Read the passage Read the passage and decide whether the statements are True or False.and decide whether the statements are True or False.1)Today rockets are only used to send astronauts into space.2)Rockets were invented by Chinese about 2,000 years ago.3)It was in the Song Dynasty that rockets were first used in wars.4)It is believed that Europeans learned how to make rockets from the Mongols.5)Wan Hu succeeded in sending himself into space with the help of rockets.Culture corner -3. Structure (5ms) Culture corner -3. Structure (5ms) Find out the topic Find out the topic sentences of each paragraph.sentences of each paragraph.Para. 1Para. 2Para. 3Para. 4 Today rockets are used to send astronauts into space or celebrate great events. Rockets were first invented by Chinese about 2,000 years ago. First rockets were used in battles in China and then it was spread to Europe. Rockets were also used in other ways.Homework Find out more information about rocket on Internet. Then share it with your classmates Tomorrow Period 3Period 3Module 4 Great ScientistsGrammar Culture cornerGrammar - 1. Observation (5ms) Grammar - 1. Observation (5ms) Find out the following sentences which belong to Passive Voice. Yesterday I listened to music at home.Yesterday I listened to music at home. A sound of piano is heard in the living room.A sound of piano is heard in the living room. Alexander Graham Bell invented the telephone in 1876.Alexander Graham Bell invented the telephone in 1876. An article was written by him.An article was written by him. They know that he is an expert.They know that he is an expert. In Pakistan rice will be grown in many parts of the In Pakistan rice will be grown in many parts of the country.country. The new hybrid rice has been developed by the Yuan The new hybrid rice has been developed by the Yuan Longping High-tech Agricultural Company of China.Longping High-tech Agricultural Company of China.present simple1past simplerefers to the future present prefectGrammarGrammar -2.Exercises (5ms) Finish the exercises of Activity 2,on page 34.1.These computers are produced in America.2.Rice has been grown in China for thousands of years.3.These electronic games were / are made in Japan.4.A new variety of rice was discovered in 1970.5.Many important discoveries have been made since the beginning of last century.Grammar3 . Grammar3 . Exercises (6ms) (6ms) Finish the exercises of Activity 3&4,on page 34.1.was educated2.was given3.were published4.was discovered5.were converted6.was exported1. Where was he educated?2. What nickname was he given?3. When were the results of the experiment published?4. When was a naturally sterile male rice plant finally discovered?5. How many square kilometres of rice fields were converted to growing vegetables?6. Where was Yuan Longpings rice exported?Grammar-4. Observation (6ms) Grammar-4. Observation (6ms) When will you use passive voice? Look! ThereLook! There s nothing here. Everything has been taken s nothing here. Everything has been taken away.away. I was born in 1981.I was born in 1981. She is liked by everybody.She is liked by everybody. He is said to be a good teacher.He is said to be a good teacher. YouYou ll be contacted.ll be contacted. Star WarStar War is acted by Harrison Ford. is acted by Harrison Ford.不知道动作的执行者不知道动作的执行者不必提出动作的执行者不必提出动作的执行者强调动作的承受者强调动作的承受者习惯用法习惯用法不确定动作的执行者不确定动作的执行者行文的需要行文的需要Grammar-5. Observation (5ms) Grammar-5. Observation (5ms) Do you know the tenses of the passive voice of the following? Xiao Wang, you are wanted in the office.Xiao Wang, you are wanted in the office. I was invited to the concert.I was invited to the concert. We hope that an agreement will be arrived at.We hope that an agreement will be arrived at. He said that the bridge would be built next year.He said that the bridge would be built next year. The party has been planned since the new year.The party has been planned since the new year. The book had been sold out when I got there.The book had been sold out when I got there. Our class will have been taught by Miss Xie for one year.Our class will have been taught by Miss Xie for one year. This question is being discussed at the meeting.This question is being discussed at the meeting. When I called, tea was being served.When I called, tea was being served.时态动词形式一般现在时一般现在时一般过去时一般过去时一般将来时一般将来时现在进行时现在进行时过去进行时过去进行时现在完成时现在完成时过去完成时过去完成时过去将来时过去将来时am / is / are + 过去分词过去分词 (p.p.)was / were + p.p.shall / will + be + p.p.am / is / are + being + p.p.was / were + being + p.p.has / have + been + p.p.had been + p.p.should / would + bebe + p.p.Grammar-6.Observation (5ms) Grammar-6.Observation (5ms) Are there any differences between the two groups of sentences? He told her a long story.He told her a long story. She was told a long story.She was told a long story. A long story was told to her.A long story was told to her.p Mother bought me a new coat.p I was bought a new coat.p A new coat was bought for me.give, show, hand, send, pay, lend, pass, tell, write, bring, sell, offer, cause, wish, teach, buy等常有双宾等常有双宾语语,变被动态时应考虑加上介词变被动态时应考虑加上介词for或或toGrammar-7. Observation (5ms) Grammar-7. Observation (5ms) Can you find out anything special around the sentences below? The flowers smell sweet.The flowers smell sweet. The food tastes nice.The food tastes nice. That sounds very good.That sounds very good. Silk feels soft.Silk feels soft. The cloth washes well.The cloth washes well. The poem reads smoothly.The poem reads smoothly. This kind of rice cooks more quickly than that kind.This kind of rice cooks more quickly than that kind. This book sells good.This book sells good.系动词系动词 + adj.:主动表被动主动表被动某些和某些和well, easily等副词连用的不及物动词等副词连用的不及物动词, 如如read, wash, clean, cook, close, cost, lock, look, open, sell, write, wear, etc.Grammar-8. Practice (9ms)Grammar-8. Practice (9ms) 历年高考题历年高考题1.Thewindowisdirty.Iknow.It_forweeks.A.hasntcleanedB.didntcleanC.wasntcleanedD.hasntbeencleaned2.Nowthatsheisourofajob,Lucy_goingbacktoschool,butshehasntdecidedyet.A.hadconsideredB.hasbeenconsideringC.consideredD.isgoingtoconsider3.ThemayorofBeijingsaysthatallconstructionworkfortheBeijingOlympics_by2006.A.hasbeencompletedB.hascompletedC.willhavebeencompletedD.willhavecompleted4.Accordingtotheartdealer,thepainting_togoforatleastamilliondollars.A.isexpectedB.expectsC.expectedD.isexpecting5.-Whathappenedtothepricelessworksofart?-_.A.TheyweredestroyedintheearthquakeB.TheearthquakewasdestroyingthemC.TheydestroyedintheearthquakeD.Theearthquakedestroyedthem6.-Thewindowisdirty.-Iknow.It_forweeks.A.hasntcleanedB.didntcleanC.wasntcleanedD.hasntbeencleaned7.Whenandwheretogofortheno-salaryholiday_yet.A.arenotdecidedB.havenotbeendecidedC.isnotbeingdecidedD.hasnotbeendecided8.Anewcinema_here.Theyhopetofinishitnextmonth.A.willbebuiltB.isbuiltC.hasbeenbuiltD.isbeingbuilt9. Thenewsuspensionbridge_bytheendoflastmonth.A.hasbeendesignedB.hadbeendesignedC.wasdesignedD.wouldbedesigned10.Hundredsofjobs_ifthefactorycloses.A.loseB.willbelostC.arelostD.willlose11.Rainforests_andburnedatsuchaspeedthattheywilldisappearfromtheearthinthenearfuture.A.cutB.arecutC.arebeingcutD.hadbeencut12.Thefirstuseofatomicweaponswasin1945,andtheirpower_increasedenormouslyeversince.A.isB.wasC.hasbeenD.hadbeenHomework 1.Finish the related exercises on WB. Period 4Module 4 Great ScientistsReading &Writing Speaking Reading &Writing1. Brainstorm (3ms) Reading &Writing1. Brainstorm (3ms) Do you know who is him?Stephen HawkingWhen & where was he born?Why was he famous?When did he discover /invent?Reading &Writing2. Vocabulary(3ms) Reading &Writing2. Vocabulary(3ms) Match the words in the box with the definitions.a person who has been attacked, injured or killed as a result of a crime, an accident, etc.to discover the cause of an illness or a problema book that sells in very large numbersan illnessthe study of the origin and development of the universethe act of creatingthe state of being disabledvictimdiagnosebest-sellerdiseasecosmologycreationdisabilityReading &Writing3. Numbering(5ms) Reading &Writing3. Numbering(5ms) Read the passage about Stephen Hawking and number the paragraphs in the correct order.Answers:2-3-1Reading &Writing4. Numbering(5ms) Reading &Writing4. Numbering(5ms) Write the number of the paragraphs.This paragraph explains why Hawking is famous.This paragraph talks about Hawkings personal life.This paragraph talks about Hawkings scientific career.Paragraph 1( the third in the book)Paragraph 2( the first in the book)Paragraph 3( the second in the book)Reading &Writing5. Discussion (4ms) Reading &Writing5. Discussion (4ms) Discuss with your group members .Do you know how to write a biography of a famous person? Para. 1: the general evaluation of the person Para. 2: his or her childhood, education, earlier life Para. 3: his or her research, or important positioning a certain field.Reading &Writing6. Writing (15ms) Reading &Writing6. Writing (15ms) Write three short paragraph about Albert Einstein using the notes in Activity 4. Begin like this: Albert Einstein was probably the most brilliantscientists of the twentieth century.Reading &Writing 7. Peer checking and rewriting Reading &Writing 7. Peer checking and rewriting (10ms)(10ms) Read your writing to your partner. Check and rewrite your writing according to the following. Then share it with the whole class.Are you clear what happen(4Wand H)Do you know the writers attitude and emotion?Are there any good connecting words or phrases?Are there any good phrases or sentences?Are there any spelling mistakes? Homework Go to the library or surf the Internet to collect more Go to the library or surf the Internet to collect more information about the life of a famous scientist. Then information about the life of a famous scientist. Then complete a poster introducing him/ her to your complete a poster introducing him/ her to your classmates. Play attention to the questions like these:classmates. Play attention to the questions like these: When and where was he born?When and where was he born? Why was he famous?Why was he famous? Where did he live and work?Where did he live and work? When did he discover/invent-?When did he discover/invent-?Language Date BankLanguage points for Reading Language Date BankLanguage Date Bankthe key to sth. / doing sth. -the key to sth. / doing sth. -的关键的关键的关键的关键e.g. 这就是考试失败的关键。这就是考试失败的关键。 This is the key to failure in the exam.= This is the key to failing in the exam. 她获得成功的关键在于她的努力。她获得成功的关键在于她的努力。 The key to her success is based on her efforts.1. He thought that the key to feeding people was to have more rice and to produce it more quickly.Language Date BankLanguage Date Bank2. He thought there was only one way to do this - by crossing different species of rice plant, .( (one) way to do sth. = (one)way of doing sth.one) way to do sth. = (one)way of doing sth.Thats not a right way to solve the problem.Im not happy with this way of working.by crossing 通过杂交的方式通过杂交的方式Switch it by pressing this button.I will contact you by e-mail.species (singl. / pl.) 种种,物种物种There are many species of dogs.Language Date BankLanguage Date Bankexperiment: (n.) c / u实验；试验实验；试验experiment: (V.)做实验做实验 e.g. 有人认为用动物来做实验是很残忍的。有人认为用动物来做实验是很残忍的。Some people think that its cruel to experiment on animals.e.g.我不断尝试，直到找到合适的方法为止我不断尝试，直到找到合适的方法为止。I experimented on and on until I found the right method.3. First Yuan Longping experimented with different types of rice.do / perform / carry out an experiment 做做/进行实验进行实验Language Date BankLanguage Date Bank4. This was the breakthrough.breakthrough: an important development that may lead to an agreement or achievement 重大进展重大进展,突破突破 make a breakthrough a major breakthrough有人说，这是癌症研究中的重要突破。有人说，这是癌症研究中的重要突破。They say this is a major breakthrough in cancer research.Language Date BankLanguage Date Bank = Rice fields were changed to grow vegetables and other cash crops.convert (sth) to / into sth: 把把转变成；转变，改变转变成；转变，改变e.g. 那家工厂把铁转变成钢。那家工厂把铁转变成钢。That factory converts iron into steel.e.g. 我把我的美元换成了欧元。我把我的美元换成了欧元。I converted my dollars into euros.5. 50 kilometres of rice fields were converted to growing vegetables and other cash crops.Language Date BankLanguage Date Bankexport: (V.) to sell and send goods to anther country 出口，输出出口，输出6. Following this, Yuan Longpings rice was exported to other countries, such as .印度向许多国家出口茶叶和棉花。印度向许多国家出口茶叶和棉花。India exports tea and cotton to many different countries.90%的发动机都出口到欧洲。的发动机都出口到欧洲。90% of engines are exported to Europe.export (n.) import (v. / n.)export tradeimports of oil出口贸易出口贸易石油的进口石油的进口Language Date Bank Language Date Bank Fill in the blanks. Fill in the blanks. 1.在水稻种植界，中国科学家袁隆平是一位重要人士。Inrice-growingworld,theChinesescientist,YuanLong-ping,isa_.2.袁隆平生长在中国。YuanLongpingwasbornand_inChina.3.袁隆平从小就对植物感兴趣。FromanearlyageYuanLongping_plants.4.他想，养活世人的关键是更多更快地生产水稻。Hethoughtthat_feedingbreeding.leading figurebrought up was interestedinthe key to5.他认为，唯一的办法是使不同种类的水稻杂交。Hethoughttherewas_dothis_crossingdifferentspeciesofriceplant.6.全国各地的研究者们被召集在一起开发新的水稻种。Researchers_fromalloverChinato_thenewsystem.7.由于袁隆平的发现，中国的水稻产量在20世纪90年代增长了47.5%。_YuanLongpingsdiscoveriesChinesericeproduction_47.5percentinthe1990s.the only way tobywere brought in developAs a result ofrose by1.他们请来专家讨论这个方案。他们请来专家讨论这个方案。他们请来专家讨论这个方案。他们请来专家讨论这个方案。2.由于大坝的修建，湖面将上升由于大坝的修建，湖面将上升由于大坝的修建，湖面将上升由于大坝的修建，湖面将上升6363米。米。米。米。3.他是在乡下长大的。他是在乡下长大的。他是在乡下长大的。他是在乡下长大的。4.这位科学家通过不同的品种的杂交培植出一种新的水这位科学家通过不同的品种的杂交培植出一种新的水这位科学家通过不同的品种的杂交培植出一种新的水这位科学家通过不同的品种的杂交培植出一种新的水稻。稻。稻。稻。Theyve brought in experts to discuss the scheme.Theyve brought in experts to discuss the scheme.As a result of the dam, the water level of the lake was As a result of the dam, the water level of the lake was going to rise by 63 metres.going to rise by 63 metres.He was brought up in the countryside.He was brought up in the countryside.The scientist developed a new kind of rice by crossing The scientist developed a new kind of rice by crossing different species.different species.Language Date Bank Language Date Bank Translations. Translations. 1.很多人在那个森林中搜寻那个丢失的孩子。很多人在那个森林中搜寻那个丢失的孩子。很多人在那个森林中搜寻那个丢失的孩子。很多人在那个森林中搜寻那个丢失的孩子。2.那间办公室已经被变成会议室。那间办公室已经被变成会议室。那间办公室已经被变成会议室。那间办公室已经被变成会议室。3.这已经成为当前最主要的话题。这已经成为当前最主要的话题。这已经成为当前最主要的话题。这已经成为当前最主要的话题。4.他们用一种新型的发动机进行试验。他们用一种新型的发动机进行试验。他们用一种新型的发动机进行试验。他们用一种新型的发动机进行试验。Many people were searching the forest for the lost Many people were searching the forest for the lost child.child.The office has been converted into a meeting room.The office has been converted into a meeting room.These have become the leading topics of the hour.These have become the leading topics of the hour.They experimented with a new type of engines.They experimented with a new type of engines.同学们同学们来学校和回家的路上要注意安全来学校和回家的路上要注意安全同学们同学们来学校和回家的路上要注意安全来学校和回家的路上要注意安全