高中英语必修五-unit 1 课文详解
新课标高中英语必修5 课文翻译与要点 unit1
1.必修五Unit 1 JOHN SNOW DEFEATS “KING CHOLERA”约翰·斯诺击败“霍乱王”John Snow was a famous doctor in London - so expert, indeed, that he attended Queen Victoria as her personalphysician.约翰·斯诺是伦敦一位著名的医生——他的确医术精湛，因而成为照料维多利亚女王的私人医生。
But he became inspired when he thought about helping ordinary people exposed to cholera.但他一想到要帮助那些得了霍乱的普通百姓时，他就感到很振奋。
This was the deadly disease of its day.霍乱在当时是最致命的疾病，Neither its cause nor its cure was understood.人们既不知道它的病源，也不了解它的治疗方法。
So many thousands of terrified people diedevery time there was an outbreak.每次霍乱暴发时，就有大批惊恐的老百姓死去。
John Snow wanted to face the challenge and solve this problem.约翰·斯诺想面对这个挑战，解决这个问题。
He knew that cholera would never be controlled until itscause was found.他知道，在找到病源之前，霍乱疫情是无法控制的。
He became interested in two theories that possibly explained how cholera killed people.斯诺对霍乱致人死地的两种推测都很感兴趣。
高中英语必修五《unit1 Great Scientists》示范说课稿
《unit1 Great Scientists》说课稿各位评委老师，上午好！我是号考生，我今天说课的题目是《unit1 Great Scientists》。
我主要从教材分析、教学方法与策略、教学过程、板书设计等几个步骤向大家详细地讲解我对这节课的安排。
一．说教材1. 教材内容本节课是人教课标版必修5第一单元的第一课时的Reading部分，是该单元的主要内容，它介绍了英国著名医生John Snow是如何通过考察、分析、探究的科学方法，发现并控制“霍乱”这种传染病的。
通过阅读课文，使学生感悟科学家的周密观察、勇于探索、认真分析的科学精神，使学生了解科学方发现的全过程具有其科学的严密性。
2. 教学目标结合单元教学要求和本课特点，充分考虑学生的年龄特点、认知水平，遂将本课的教学目标确定为：知识目标1) Get students to learn the useful new words and expressions in this part.2) Let students learn about some great scientists and their contribution.3) Have students read the passage and know about John Snow and how he defeated “King Cholera”.能力目标1) Develop students’ reading ability and let them learn different reading skills.2) Enable students to talk about great scientists and tell their stories.情感目标1) Let students learn from great scientists, stimulate their love and respect for them and develop their moral qualities.2) Develop student’s sense of cooperative learning.3. 教学重点因为本组教材的重点了解项目是“John Snow 破解King Cholera难题”，所以确定本课的教学重点是：1) Let students learn about some great scientists and their contributions.2) Get students to read the passage and know about John Snow and how he defeated “ King Cholera”.3) Have students learn different reading skills.4．教学难点考虑到学生拓展阅读能力，语言输出能力等方面还需进一步努力，所以将本课的教学难点确定为：1) Develop students’ reading ability.2) Enable students to talk about great scientists and tell their stories.3) Let students learn how to organize scientific research.二．说教法和学法1. 教学方法引导学生独立思考，合作学习，进行师生、生生互动的“任务型”教学，设计了许多易于操作的任务型活动。
必修5Unit1第一篇课文含翻译
必修5 Unit 1JOHH SHOW DEFEA TS “KING CHOLERA”John Snow was a famous doctor in London - so expert, indeed, that he attended Queen Victoria as her personal physician. But he became inspired when he thought about helping ordinary people exposed to cholera. This was the deadly disease of its day. Neither its cause nor its cure was understood. So many thousands of terrified people died every time there was an outbreak. John Snow wanted to face the challenge and solve this problem. He knew that cholera would never be controlled until its cause was found.He became interested in two theories that possibly explained how cholera killed people. The first suggested that cholera multiplied in the air. A cloud of dangerous gas floated around until it found its victims. The second suggested that people absorbed this disease into their bodies with their meals. From the stomach the disease quickly attacked the body and soon the affected person died.John Snow suspected that the second theory was correct but he needed evidence. So when another outbreak hit London in 1854, he was ready to begin his enquiry. As the disease spread quickly through poor neighbourhoods, he began to gather information. In two particular streets, the cholera outbreak was so severe that more than 500 people died in ten days. He was determined to find out why.First he marked on a map the exact places where all the dead people had lived. This gave him a valuable clue about the cause of the disease. Many of the deaths were near the water pump in Broad Street (especially numbers 16, 37, 38 and 40). He also noticed that some houses (such as 20 and 21 Broad Street and 8 and 9 Cambridge Street) had had no deaths. He had not foreseen this, so he made further investigations. He discovered that these people worked in the pub at 7 Cambridge Street. They had been given free beer and so had not drunk the water from the pump. It seemed that the water was to blame.Next, John Snow looked into the source of the water for these two streets. He found that it came from the river polluted by the dirty water from London. He immediately told the astonished people in Broad Street to remove the handle from the pump so that it could not be used. Soon afterwards the disease slowed down. He had shown that cholera was spread by germs and not in a cloud of gas.In another part of London, he found supporting evidence from two other deaths that were linked to the Broad Street outbreak. A woman, who had moved away from Broad Street, liked the water from the pump so much that she had it delivered to her house every day. Both she and her daughter died of cholera after drinking the water. With this extra evidence John Snow was able to announce with certainty that polluted water carried the virus.To prevent this from happening again, John Snow suggested that the source of all the water supplies be examined. The water companies were instructed not to expose people to polluted water any more. Finally "King Cholera" was defeated.约翰·斯诺曾经是伦敦的一位著名的医生,所以专家,实际上,他参加的维多利亚女王在她的私人医生。
人教版高中英语必修5Unit 1全单元 PPT课件 图文
6.Who invented the way of giving electricity to everybody in large cities?
Thomas Edison (1847-1931) an American inventor
Bell
Newton
Galileo
Edison
Watt
Curie
Franklin
Einstein
Joule
Nobel
Flaming
Hawking
杨振宁
李政道
丁肇中
李远哲
朱棣文
崔琦
王选
袁隆平
钱学森
陈景润
2. Try the quiz on P1 and find out who knows the most.
What do you know about cholera?
• Cholera is caused by a bacterium called Varian cholera（霍乱弧菌）.
It infects people’s intestines (肠胃), causing diarrhea（腹泻）, vomiting and leg cramps (腿抽筋). The most common cause of cholera is people eat food or drink water that has been polluted by the bacteria.
•AIDS,SARS are infectious diseases 1. Infectious diseases can be spread easily.
高二英语必修5 Unit 1 课文知识点梳理
JOHH SHOW DEFEATS “KING CHOLERA”John Snow was a famous doctor in London - so expert, indeed, that he attend ed Queen Victoria as her personal physician. 【so...that引导结果状从】【when引导时间状从；exposed(done)作后定】This was the deadly disease of its day.Neither its cause nor its cure was understood. 【neither...nor的用法；被动语态】So many thousands of terrified people died every time there was an outbreak. 【every time引导时间状从，中间带有一个there be句型】John Snow wanted to face the challenge and solve this problem.He knew that cholera would never be controlled until its cause was found.【that引导的宾从中套一个until引导的时间状从；情态动词的被动语态】He became interested in two theories that possibly explained how cholera killed people.【be/become interested in...；that引导的定从中套一个how引导的宾从】The first suggested that cholera multiplied in the air.【that引导宾从】A cloud of dangerous gas floated around until it found its victims. 【until引导时间状从】The second suggested that people absorb ed this disease into their bodies with their meals.【that引导宾从】From the stomach the disease quickly attacked the body and soon the affected person died.John Snow suspected that the second theory was correct but he needed evidence.【that引导宾从】So when another outbreak hit London in 1854, he was ready to begin his enquiry.【when引导时间状从】As the disease spread quickly through poor neighbourhoods, he began to gather information.【as引导时间状从】In two particular streets, the cholera outbreak was so severe that more than 500 people died in ten days.【so...that引导结果状从】He was determined to find out why.【被动语态】First he marked on a map the exact places where all the dead people had lived.【where引导定从】This gave him a valuable clue about the cause of the disease.Many of the deaths were near the water pump in Broad Street (especially numbers 16, 37, 38 and 40).He also noticed that some houses (such as 20 and 21 Broad Street and 8 and 9 Cambridge Street) had had no deaths.【that引导宾从；had done过去完成时】He had not foreseen this, so he made further investigations.He discovered that these people worked in the pub at 7 Cambridge Street.【that引导宾从】They had been given free beer and so had not drunk the water from the pump.【过去完成时的被动；so和had间省略主语they】It seemed that the water was to blame.【that引导表从】Next, John Snow looked into the source of the water for these two streets.【that引导宾从；polluted作后定（高考中出现过）】He immediately told the astonished people in Broad Street to remove the handle from the pump so that it could not be used.【so that引导目的状从（是为了）；情态动词的被动】Soon afterwards the disease slowed down.He had shown that cholera was spread by germs and not in a cloud of gas.【that引导宾从；被动语态】In another part of London, he found supporting evidence from two other deaths that were linked to the Broad Street outbreak.【that引导定从】A woman, who had moved away from Broad Street, liked the water from the pump so much that she had it delivered to her house every day.【who引导非限制定从；so...that引导结果状从】Both she and her daughter died of cholera after drinking the water.With this extra evidence John Snow was able to announce with certainty that polluted water carried the virus.【that引导宾从（没有直接跟在谓语动词之后）】To prevent this from happening again, John Snow suggested that the source of all the water supplies be examined.【that引导宾从】The water companies were instruct ed not to expose people to polluted water any more.Finally "King Cholera" was defeated.定向练习，举一反三一、单词和短语1.The medicine will cure you ______ your cough.2.The doctor devoted himself to finding the cure ______ the disease.3.Most shin cancers are _______ (cure) if _______ (treat) early.4.Many patients are not getting the medical ________ (treat) they need.5.She likes her job to be ______ challenge.6.The new discovery ________ (challenge) traditional beliefs in 1850.7.Reducing the gap between rich and poor is one of the _________ (challenge) the government faces.8.Try tennis, badminton or boring. In short, try anything _________ (challenge).pletely ________ (absorb) in her new novel, the young writer kept thinking and writing in her study for a dozen hours.10.His ability _______ (absorb) information was astonishing, but his concentration time was short.11.Those small companies have been absorbed ______ the large company.12.When something did interest me, I could become ______ (absorb).13.He left office after _________ (suspect) of theft.*14.They suspected him ______ giving false evidence.15.He is the first _________ (suspect) of giving away government secrets to the enemy.*16.She blamed him ______ the failure of their marriage.17.If you fail the exam, you will only have yourself ________ (blame).18.Which driver was _______ (blame) for the accident?19.They put the blame for the abortion of the project ______ us.20._______ (blame) for the broken vase, the boy hung his head.21.There’s _____ direct link between diet and heart disease.22.The police suspect that the two cases may _______ (link).23.The Channel Tunnel _______ (link) Britain with the European contient.24.They walked with their arms ______ (link).25.Always read the _________ (instruct) on the bottle thoroughly and take the right amount ofmedicine.26.He is the ________ (instruct) who taught me how to shi.st week, we _________ (instruct) by our clients that you owe them 300 dollars.28.He instructs us ______ making self-introduction.29.She arrived at 10 o’clock as _______ (instruct).30.All the evidence suggests that he _______ (steal) the money.31.Earlier reports suggested that a meeting _________ (take) place next Sunday.32.I suggest that you _______ (thought) over your position very carefully.33.I suggest _______ (add) vitamins E and A to your diet.34.He suggested that we _______ (hold) a meeting to discuss this problem.35.He suggested _______ (hold) a meeting to discuss this problem.36.The doctor advised my father _______ (give) up smoking.37.The volunteers contribute most of their own spare time ______ the project.38.The young population of a nation are the people ________ (contribute) most to a country’s economic development.39.Her ________ (contribute) to the reaserch were largely unacknowledged.二、语法专项1.后置定语(1)The adobe dwellings(土坯房) ______ (build) by the Pueblo Indians are admired by even the most modern architects. (2015年全国卷)(2)The airport _______ (complete) last year has helped promote tourism in this area.(3)There are hundreds of vistor _______ (wait) in front of the Art Gallery.COPERNICUS’ REVOLUTIONRRY THEORYNicolaus Copernicus was frightened and his mind was confused.Although he had tried to ignore them, all his mathematical calculations led to the same conclusion that the earth was not the centre of the solar system.【although引导让步状从；that引导同位从】Only if you put the sun there did the movements of the other planets in the sky make sense.【if引导条件状从；only放句首时，句子要用部分倒装（波浪线部分为主句谓语动词，did助动词置于主句主语之前）】【as引导原因状从；would have done虚拟语气】They believed God had made the world and for that reason the earth was special and must be the centre of the solar system.【省略that的宾从；for‘由于...’】The problem arose because astronomers had noticed that some planets in the sky seemed to stop, move backward and then go forward in a loop.【because引导原因状从；that引导宾从】Others appeared brighter at times and less bright at others.This was very strange if the earth was the centre of the solar system and all planets went round it.【if引导条件状从】Copernicus had thought long and hard about these problems and tried to find an answer.He had collected observations of the stars and used all his mathematical knowledge to explain them.But only his new theory could do that.So between 1510 and 1514 he worked on it, gradually improving his theory until he felt it was complete.【until引导时间状从】In 1514 he showed it privately to his friends.The changes he made to the old theory were revolutionary.【省略that/which的定从】He placed a fixed sun at the centre of the solar system with the planets going round it and only the moon still going round the earth.He also suggested that the earth was spinning as it went round the sun and this explained changes in the movement of the planets and in the brightness of the stars.【that引导宾从；as引导时间状从】His friends were enthusiastic and encouraged him to publish his ideas, but Copernicus was cautious.He did not want to be attacked by the Christian Church, so he only published it as he lay dying in 1543.【as引导时间状从】Certainly he was right to be careful. The Christian Church rejected his theory, saying it was against God's idea and people who supported it would be attacked.【who引导定从】Yet Copernicus' theory is now the basis on which all our ideas of the universe are built.【on which 引导定从】His theory replaced the Christian idea of gravity, which said things fell to earth because God created the earth as the centre of the universe.【which引导非限制定从中套一个because引导的原因状从】Copernicus showed this was obviously wrong.Now people can see that there is a direct link between his theory and the work of Isaac Newton, Albert Einstein and Stephen Hawking.【that引导宾从】。
人教版高中英语必修五Unit1知识点详解教学文案
必修 5 Unit1 Great scientistsPart 1. Warming up1.explain及物动词（vt.）解释;说明;阐明[(+to)][+wh-][+(that)]He explained that he had been cheated. 他解释说他是上当受骗了。
Can you explain how the machine operates?你能解释一下这机器是如何运转的吗?Please explain this rule to me.请给我讲解一下这条规则。
不及物动词（vi.）解释;说明;辩解I've got to explain about it. 我得解释一下此事。
2.characteristicn. 特征；特性Kindness is one of his characteristics.adj. 独特的I heard my friend’s characteristic laugh.be characteristic of sb./sth. 是.....的特性Such bluntness is characteristic of hin. 如此迟钝是他的特性。
3. Who put forward a theory about black holes?put forward 提出（建议等）；提名;提前，把时钟往前拨He put forward a new plan. 他提出一个新计划。
May I put your name forward as a possible chairman of the committee?我能否提名你当委员会主席？[归纳拓展]put down 记下；镇压put out 关掉；熄灭put aside 放在一边；储存；保留put off 推迟；延期put up 建造；举起；张贴put on 穿上put away 收好选词填空（put off, put up, put forward, put aside, put out）①The plan that you _____ at the meeting is wonderful.②Many tall buildings were _____ along the road.③Firefighters have been called to _____ the fire in the city center.④He has a little money to _____ for a rainy day.⑤Don’t _____ until tomorrow what can be done today.Part 2. Pre-reading, reading and comprehending1. Do you know how to prove a new idea in scientific researchhow to prove a new idea 为“疑问词+不定式”结构，该结构可在句中作主语、宾语、表语等。
英语必修五第一单元完整版.ppt
高三总复习 ·RJ ·英语
进入导航
第一部分·必修5·Unit 1 第25页
系列丛书
高三总复习 ·RJ ·英语
进入导航
第一部分·必修5·Unit 1 第23页
系列丛书
Ⅳ.课文回顾 John Snow was a famous doctor in London. In his time cholera was the 1.deadly (dead) disease. So John Snow made up his mind to help ordinary people 2.exposed (expose) to cholera. At that time, no one knew its cause or cure. He knew it would never be under control 3.until its cause was found. He thought people got attacked by this disease absorbed into their bodies. He tried to prove this. So when another outbreak hit London in 1854, he gathered information and made a map, 4.making (make) where all the dead people had lived. It was valuable. And finally he drew a 5.conclusion (conclude) that the
高三总复习 ·RJ ·英语
进入导航
第一部分·必修5·Unit 1 第20页
系列丛书
高中英语必修五 Unit1 great scientists 课件
7. expose (…) to sth. 暴露(…..)在……中 8. face the challenge 迎接挑战 9. absorb sth. into… 把…...吸入…… 10. gather the information 收集信息 11. be determined to do sth. 决心干某事 12. make further investigation 作进一步调查
Make a question Which theory is correct?
Think of a method
Para. 3 Collect data on those who were ill or
died and where they got their water.
Collect results
Unit 1 Great Scientists
Reading
这一课的主要话题是伟大科学家，学生对这个有兴趣，而
且有话可说，更有利于教学的开展，所以，刚开始用知识问 答形式热身，进行知识拓展，这一环节当中，有图片的展示 ，有视频的放映，使学生更加直观形象的了解伟大科学家， 从而也为本课的阅读教学作好了铺垫。
water pump. _6__ He had the handle removed from the water pump.
Summery:
John Snow was a well-known _d_o_c_to_r__ in London in the _1_9_th century. He wanted to find the _ca_u__se__ of cholera in order to help people __e_x_p_o_se_d__ to cholera. In 1854 when a cholera _b_r_o_k_e__ out, he began to gather information. He m__a_r_k_e_d_ on a map where all the dead people had lived and he found that many people who had drunk the dirty water from the _p_u_m__p_ died. So he decided that the polluted water carried cholera. He suggested that the _s_o_u_r_c_e_ of all water supply be _e_x_a_m_i_n_e_d_ and new methods of dealing with polluted water be found. Finally, “King Cholera”
- 1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。
必修五Unit 1 Great Scientists 伟大的科学家steam engine 蒸汽机characteristic n.特征；特性radium n.镭put forward 提出theory n。
理论；学说infect vt.传染；感染infectious adj.传染的cholera n.霍乱scientific adj.科学的examine vt.检查；诊察；考察conclude vt. & vi.结束；结论；议定conclusion n.结论；结束；议定draw a conclusion得出结论analyse vt.分析repeat vi & vt.重复；重做n. defeat vt. N.打败；战胜；使受挫attend vt.照顾；护理；出席；参加expose vt.(与to连用)暴露；揭露；使曝光deadly adj.致命的cure n. vt.治愈；痊愈；治疗outbreak n.爆发；发作（疾病或战争）control vt.& n.控制；支配absorb vt.吸收；使专心severe adj.严重的；严厉的；严格的；剧烈的valuable adj.贵重的；有价值的clue n.线索；提示pump n.泵；抽水机pub n.酒馆；酒吧blame vt.责备；谴责；把…归咎于；n.过失；责备immediately adv.立即；马上handle n.柄；把手；vt.处理germ n.微生物；细菌addition n.加；增加；加法in addition也；另外link vt.连接；联系n.联系；环link…to…将…和…连接或联系起来announce vt.宣布；通告certainty n.确知；确信；确实instruct vt.命令；指示；教导virus n.病毒construction n.建设；结构；建筑物apart from 除…之外；此外creative adj.有创造力的；独创的co-operative adj.合作的positive adj.积极的；肯定的be strict with对…严格的revolutionary adj.革命的calculation n.计算；计算结果lead to通向；导致movement n。
移动；运动；动作make sense有意义backward adv. & adj.向后地（的）；相反地（的）；退步地（的）loop n.圈；环complete adj.完整的；完成的privately adv.私下地；秘密地spin vi. & vt.(使)旋转；纺（线）brightness n.明亮；亮度；聪颖enthusiastic adj.热情的；热心的cautious adj.小心的；谨慎的reject vt.拒绝；不接受；丢弃point of view态度；观点；看法logical adj.和逻辑的；合乎常理的John Snow was a well-known doctor in London —so famous, indeed,that he attended Queen Victoria to ease the birth of her babies.约翰斯诺在伦敦是一位著名的医生，的确，如此出名以致于由他护理维多利亚女王生孩子。
【注释：attend v.出席；到场；注意；照看attend to处理；注意倾听；专心于；照料；attendschool/ class/ church/ a wedding/ a meeting/ a lecture/ a movie; attend on/ upon sb.伺候某人；照顾某人；eg. 1) I’ll attend to the matter.我来处理此事。
2) He was very tired afterthe long run, and expected someboday to attend on him.长袍之后他感到非常疲劳，很想有个人来照顾自己一下。
▲辨析：attend, join, join in, take part in(1) attend是正式用语，一般指参加会议、典礼、婚礼、葬礼及去听课、听报告等；（2）join指加入某党派、某组织、某社会团体以及参军等，如：He joined the football club two years ago. (3) join in通常指参加某种活动，尤其指其他人一起参加某项活动，如：I hope you’ll all join in the discussion. (4) take part in指参加群众性活动、会议、劳动、游行等，往往参加者持有积极地态度，并起到一定的作用，有时可与join in互换，如：Will you take part in the English evening? 试题：——Who is ______ the patient? ——Maybe his sister.A. taking careB. looking forC. joining inD. attending on】But he became inspired when he thought about helping ordinary people exposed to cholera.但当他想到要帮助受霍乱侵扰的普通民众，他就感到受到激励（或感受到神灵的召唤）。
【注释：①inspire(1)影响或触动：eg. The falling leaves inspired her with sadness.落叶触动了她的伤感. (2) 鼓励；激励eg. 1) inspire sb. with hope激起某人的希望2) I was inspired to work harder than ever before.我受激励比以往任何时候都更加努力地工作。
②expose to使易受；使受eg. exposed themselves to disease使他们受到疾病的影响；exposed their children to classical music. 使他们的孩子们受到古典音乐的影响。
考题：1. As we all know，women do not________their faces in public in some Middle Eastern countries.A．cover B．keep C．expose D．protect2．The more one is________the Englishspeaking environment，the better he or she will learn the language. A．exposed to B．filled in C．caught on D．kept up3．The reason why people carry umbrellas in hot summer days is that ____ to strong sunlight may be harmful to the skin.A．contributing B．exposing C．contributed D．being exposed 】This was the most deadly disease of its day. 这在当时是最为致命的疾病。
【注释：deadly adj. 致命的；死一般的；绝对的；完全的如：deadly weapons致命武器；a deadly pallor.死人般的苍白；deadly enemies.不共戴天的仇敌；：deadly concentration.绝对专心】Neither its cause, nor its cure was understood.其原因及治疗方法都不为人知道。
【注释：neither和相关连词nor 连用,连接并列主语（1）、并列谓语（2）、并列宾语（3）eg. （1）Neither we nor they want it. 我们和他们都不要它。
（2）She neither called nor wrote. 她既没打电话也没写信来。
（3）I got neither the gift nor the card.我既没得到礼物，也没得到贺卡。
考题：(2008辽) 1. Bill wasn’t happy about the delay of the report by Jason，and _____.A．I was neither B．neither was I C．I was either D．either was I2. If Joe’s wife won’t go to the party，________.A．he will either B．neither will he C．he neither will D．either he will 】So many thousands of terrified people died every time there was an outbreak.所以每当这种疾病爆发的时候，就有数以千计的感到恐惧的人死掉。
【注释：every time这是由名词词组充当连词，引导时间状语从句，类似这种用法的名词短语有：不定代词+time,如：any time; each time; 介词+time 如：by the time…；序数词+time,如：the first/last time…; the +瞬间名词，如：the minute, the moment, the instant “一…就…”；the +时间名词，如：the day, the night, the month, the time…eg. 1) She demands sweets from me every time/each time she sees me. 2) The truck will have arrived by the time you have all the things packed up. 3) The first time he did the experiment, he succeeded. 4) I’ll give him your message the minute/ the moment/ the instant he arrives. 5) He bought a computer the day/ the time he got his salary. 考题：1. Don’t stop________you meet with a word you don’t understand.A．at the time B．each time C．by the time D．Sometimes2. ________you talk with someone or write a message，you show your skills to others.A．At times B．Some time C．Every time D．The time】John Snow wanted to use his knowledge to help solve this problem.约翰斯诺想用他的知识来帮助解决这个问题。