1、Unit 5The power of nature【导语】自然不仅是慈爱的母亲，也是冷血的屠夫。For many years，human beings have been trying to conquer nature，but never succeeded.Whats more，sometimes nature gets angry.It shows its power and teaches human beings different lessons by various means，such as earthquakes，floods，hurricanes，sandstorms，ty
2、phoons，droughts，landslides，tornadoes，volcanoes，and so on.Any of them can lead to terrible catastrophes. For example，on March 11，2011，a huge earthquake hit Japan，resulting in a terrible tsunami afterwards.Many cars，ships and buildings were swept away by a tenmetrehigh wall of water. Thousands of peop
3、le were confirmed dead.The total energy released by the quake was equivalent to the explosion of 6.7 trillion tons of TNT，about a thousand times the total power of all the worlds nuclear weapons.Another event was the “huge volcanic eruption in Iceland” in 2010.It caused enormous damage to air travel
4、 across western and northern Europe because of the large quantities of volcanic ash.All of these things show how powerful nature is.Compared with the great power of nature，human beings are so weak and even so helpless in face of the destruction caused by natural disasters.It would be unwise of us to
5、 fight against or even try to conquer nature.On the contrary，we should try to learn how to live with nature peacefully.【词海拾贝】1conquervt.征服；克服；攻克2lead to/result in导致3confirmvt.证实；确认；批准【问题思考】True (T) or False (F)：1A flood cant lead to terrible catastrophes.()2Human beings can conquer nature in the fut
6、ure.()答案：1.F2.F.重点单词分类记拼写高频单词1_adj.贵重的；珍贵的2_n波浪；波涛vi.波动；起伏；挥手3_n潜在性；可能性；潜能adj.可能的；潜在的4_vi.& vt.(_，_)惊慌n惊慌；恐慌5_adj.多种多样的；不同的6_vt.保证；担保答案：1.precious2.wave3.potential4.panicpanickedpanicked5.diverse6.guarantee联想拓展单词1_vi.(指火山)爆发；突然发生_n火山爆发；(战争等)爆发2_n设备；装备_vi.装备，配备3_vt.任命；委派_n任命；约定4_adj.绝对的；完全的_adv.绝对地；完
7、全地5_n一套外衣；套装vt.适合；使适宜_adj.适当的；相配的6_adj.实在的；实际的_adv.实际上；事实上7_n小说家_n小说adj.新奇的8_n雾_adj.有雾的；模糊的9_adj.不舒服的；不舒适的_adj.舒适的，舒服的_n安慰；舒适；安慰者vt.安慰10_adj.失去知觉的；未察觉的_adj.意识到的；神志清醒的11_vt.(_，_)射中；射伤_n射击；枪炮声12_adj.忧虑的；不安的_n担心；焦虑；渴望13_vi.洗澡；游泳_n沐浴；浴室14_n欣赏；感激；感谢_vt.欣赏；感激；领会15_vt.评估；评价；估计_n评价；评估答案：1.erupteruption2.equ
8、ipmentequip3appointappointment4.absoluteabsolutely5suitsuitable6.actualactually7.novelistnovel8.fogfoggy9.uncomfortablecomfortablecomfort10.unconsciousconscious11.shootshotshotshot12anxiousanxiety13.bathebath14.appreciationappreciate15.evaluateevaluation识记阅读单词1volcano n_2hurricane n. _3questionnaire
9、 n. _4candidate n. _5typhoon n. _6thunderstorm n. _7document n. _8tremble vi. _9sweat n. _vi. _答案：1.火山2.飓风；风暴3.问卷；调查表4.候选人；候补者5.台风6.雷暴7.文件；证件8.摇晃；摇动；颤抖9.汗出汗.重点短语快速记1_前往2_匆匆看一遍3_生孩子；产仔4_有天赋5_为忧虑/不安6_适合7_被委派为8_被埋在废墟下9_全部焚毁10_由到不等答案：1.make ones way2.glance through3give birth to4.have a gift for5be anxi
10、ous about6.be suitable for7be appointed as8.be buried under the ruins9burn to the ground10.vary from.to.经典句式应用记1_(收集和评估完这些信息之后)，I help other scientists to predict where lava from the volcano will flow next and how fast.(动词ing形式的完成时态作状语)2I_(刚要再睡，这时)suddenly my bedroom became as bright as day.(be abou
11、t to do.when.正要做这时)3The other two climbed down into the crater to collect some lava for later study but_(这是我的第一次经历)，I stayed at the top and watched them.(独立主格结构)4Hearing a scream，I rushed downstairs_ (结果看到)my hostess lying unconscious on the floor，surrounded by her guests.(only to do.表示出乎意料的结果) 5_(据
12、说)this boy，who had a great gift for languages and persuasion，is the father of the Manchu people.(It is said that.据说)答案：1.Having collected and evaluated the information2was about to go back to sleep when3.this being my first experience4.only to see5.It is said that.FastreadingSkim the text carefully
13、and answer.What does the author mainly talk about?_答案：The author talks about the importance of his work，the damage of the volcanic eruption and his first experience of it.CarefulreadingRead the text carefully and then choose the best answer according to the text.1The writer doesnt mind the occasiona
14、l danger of his job because_Ahe travels to unusual places and meets interesting people from all over the worldBhe likes the different ways of workingChe thinks his job is the most importantDhe is excited about danger and feels alive2Whats the job of the writer?ACollecting information for database ab
15、out Mount Kilauea.BAnalyze the information.CHelp the villagers to move their home.DTraveling around the world.3As a result of the volcanologists job，_Ahe can help other scientists predict the progress of lava from the volcanoBmany people have been warned to leave their homesCthe eruption causes less
16、 damageDthe eruption may be prevented from breaking out4Why did the volcanologist run out of the house into the back garden?ABecause his bed began shaking.BBecause his bedroom suddenly became as bright as day.CBecause he thought there was an earthquake in Hawaii.DBecause he wanted to collect informa
17、tion about the eruption.答案：1.D2.A3.A4.B.StudyreadingAnalyze the following difficult sentences in the text.1The lava that flows slowly like a wave down the mountain causes far more damage because it buries everything in its path under the molten rock.句式分析本句是一个主从复合句。主句是The lava causes far more damage；
18、that在此引导定语从句，修饰_且在从句中作_。because在此引导原因状语从句。尝试翻译_2I was fast asleep when suddenly my bed began shaking and I heard a strange sound，like a railway train passing my window.句式分析本句是一个由_连接的并列复合句。前一个分句包含一个由when引导的时间状语从句，when在此意为“就在这时，突然”。后一个分句是简单句，passing my window是动词ing形式短语作后置定语，修饰_。尝试翻译_3The other two cli
19、mbed down into the crater to collect some lava for later study，but this being my first experience，I stayed at the top and watched them. 句式分析尝试翻译_答案：1.lava主语像波浪一样顺着山坡慢慢往下流的火山熔岩所造成的损失要大得多，这是因为火山岩浆所流经的地方，一切东西都被掩埋在熔岩下面了。2andtrain我在熟睡中突然感到床铺在摇晃，接着我听到一阵奇怪的声音，就好像一列火车从我的窗前驶过。3另外两人攀下火山口去收集供日后研究用的岩浆，但我是第一次经历这
20、样的事，所以留在山顶上观察他们。.IntensivereadingRead and finish the passage carefully.It has been twenty years since I 1._(appoint) as a volcanologist working for the HVO.As a volcanologist，I think my job is the greatest one in the world，though，2._(occasional) dangerous.The most important thing about my job is tha
21、t I help protect ordinary people from one of the most 3._(power) forces on earththe volcano.My work has also saved many lives.When boiling rock erupts from a volcano and crashes back to earth，it causes 4._(little) damage，but the lava that flows slowly down the mountain causes far more damage.However
22、，the eruption 5._(it)is really exciting to watch and I shall never forget my first sight of onethere had been an eruption from the side of the mountain and red hot lava was fountaining hundreds of metres into the air，6._was a totally fantastic sight.The day after the eruption，two other scientists an
23、d I wore white protective suits to have 7._much closer look at it.We made our way to the edge of the crater and looked down into the red，8._(boil)centre.The other two climbed down into the crater 9._(collect) some lava for further study，but I stayed at the top and watched them.Today，I still love my
24、job and I am still amazed 10._the volcanoes beauty and their potential to cause great damage.答案：1.was appointed2.occasionally3.powerful4less5.itself6.which7.a8.boiling9.to collect10.at如何写旅游景点类描述性说明文旅游景点描述性说明文，在写作时要注意以下几点：1确定写作对象：旅游景点。2选准描写角度：根据写作需要确定用第一人称还是第三人称。因为不同的人称会影响写作内容的选择和写作目的的定位，如第一人称有助于增加描写
25、的真实感。3用好描写次序：描写景观时把握从整体概述到细节刻画的方法，灵活使用定点描写(同一角度描写多个景观)和定景描写(景观不变，更换观察角度)的手法。处理好空间位置的转化。4突出语言特色：以描写为主要写作手法，对景物进行介绍，并适当抒发个人感情。为此在写作中要根据内容提示，筛选可能用到的描述该景点的形容词，既要恰当、灵活地运用词汇，又要避免同一词汇的重复使用。5抓住典型特征：在描写中要做到重点突出，详略得当。可以把景点和周围环境及景点的历史意义等结合起来。6把握文章时态：文章的时态通常采用一般现在时，用于强调客观事实。【常用句式】.lie in/on/to the east/west/nor
26、th/south of.Located in.，.covers an area of.Situated in.，.is paradise for.is located/situated in/to/on.，covering an area of.has become the most popular tourist attraction for.be known/ famous for/ as.It has a population of.，with a history of.The weather here gets neither too cold nor too hot all the
27、year around.If you come to.for a visit，you will have a chance to enjoy.A trip to.will give you a glimpse of the happy lifestyle of.，known as.，attracts visitors from all over the world.A walk around.is a feast for your eyes.假设你是晨光中学高二(1)班的班长李津，得知美国学生Chris作为交换生，下学期将到你班学习。请你根据以下提示，给他写封邮件。1表示欢迎；2介绍与本地生活
28、相关的信息(如气候、饮食等)；3介绍本班情况；4希望Chris做哪些事情，以增进中美学生间的了解和友谊。注意：1.请勿提及与考生相关的真实信息；2.可以适当增加细节，使内容充实、行文连贯；3词数80左右；开头已给出，不计入总词数。参考词汇：交换生exchange student Dear Chris，Im Li Jin，monitor of Class One，Grade Two._Yours，Li Jin【范文点评】范文点评Dear Chris，Im Li Jin，monitor of Class One，Grade Two.Knowing that you will study in ou
29、r class as an exchange student next semester， we all feel excited and eager to meet you.Generally speaking，the climate here is pleasant.But in winter it can be a bit cold, so youd better carry some overcoats.As is well known，the Chinese food is delicious，Im confident you will adore it.Our class, con
30、sisting of twenty girls and thirty boys，is a happy group.Dont hesitate to ask us for help.Besides，I hope you show us American schools and culture，and meanwhile convey our culture to your classmates.Were looking forward to seeing you.Yours，Li Jin本篇习作语言地道，覆盖了所有要点，并且适当增加了细节，使内容充实、行文连贯。本文同时运用了较多的高级句式结构，
31、另外还多处正确运用了非谓语动词。非谓语动词作时间状语，表示与句子主语动作同时或几乎同时进行。此处表达一听到Chris要来，全班同学都激动的那种心情。这是评注性短语，常放在句首作状语，也可以换成generally或in general。同时在此处也起到过渡作用。处as引导非限制性定语从句，as代指整句话内容。非谓语动词consisting of作后置定语使用。另外，consist of用得非常准确，需要提醒的是这个短语不能使用被动语态写一篇介绍华山的短文，80词左右。要点如下：1华山位于陕西省华阴市，是我国著名的五岳(Five Sacred Mountains)之一；2华山有五座山峰(peak)
32、，分别为东峰、西峰、南峰、北峰和中峰；3可以步行上山，也可乘索道(ropeway)或缆车(cable car)。_答案：Mount HuaMount Hua is located in Huayin，Shannxi Province.It is famous as one of the Five Sacred Mountains of China.Its five main peaks are the East Peak，the West Peak，the South Peak，the North Peak and the Middle Peak.You can climb to the to
33、p on foot，taking the ropeway，or riding in a cable car，where you can enjoy the scenery.Youll see a number of strange hills and unique rocks.When you arrive at the top，you can look out over a sea of clouds.Now it is attracting more and more people.Why not pay a visit here？A级基础过关.用所给单词的正确形式填空1She was f
34、ound alive but _(conscious)2Im _(anxiously) about her safety.3To show our _(appreciate) for all your hard work，wed like to give you a bonus.4People like to live a life full of _(various)5I stood there _(tremble) with anger.6The company guaranteed _(deliver) my order within two days，which made me sat
35、isfied.7The labs in our school are _ with a lot of good _， which is helpful for our study.(equip)8She _ her dress as fashion changes for she has _ kinds of clothes and shoes and she thinks that _ is the spice (调味品) of life.(vary)答案：1.unconscious2.anxious3.appreciation4variety5.trembling6.to deliver7
36、.equippedequipment8variesvariousvariety.选词填空burn to the ground; have a gift for; make ones way to; glance through; make up; out of the way；in the distance; pick up; be home to; give birth to1Nowadays many young couples have volunteered to _ only one child.2Women _ over 65 percent of the workforce in
37、 that country.3Hearing the bell ringing, the lady rose from her chair and _ the door.4She _ making every visitor feel at ease.5He carelessly _ the notice on the bulletin board and got away.6I climbed the hill and saw a faint light coming from a house _7The big fire spread across the street quickly a
38、nd buildings on both sides _8She said she _ some Japanese while she was in Japan for a visit.9Zhongguancun _ the Chinese Academy of Sciences and more than ten famous universities.10Make sure the kids keep _ while Im working.答案：1.give birth to2.make up3.made her way to4.has a gift for5.glanced throug
39、h6.in the distance7were burned to the ground8.picked up9.is home to10.out of the way.根据汉语完成句子1She _ when she thought shed lost the tickets.她十分惊慌，以为自己把入场券丢了。2I woke up _我醒来时发现大家都走了。3_the air in the countryside is clearer than that in the city.据说乡下的空气要比城里更清新。4He _ what had happened.他急于知道出了什么事。5We cann
40、ot _ of trains in foggy weather.我们不能保证火车在雾天正点到达。答案：1.got into a panic2.only to find everybody had gone3It is said that4.was anxious to know5.guarantee the punctual arrivalB级能力提升.阅读理解阅读下面短文，从每题所给的四个选项(A、B、C和D)中，选出最佳选项。(2018天津卷)Fire Prevention InformationThe University of Adelaide employs a fulltime s
41、taff of fire prevention professionals.They inspect all campus buildings and test and maintain all sprinkler (喷水灭火装置)systems，fire alarms，and fire extinguishers (灭火器)They also provide educational programmes on fire safety in the residence halls.Whenever you move to a new area，you should locate the fir
42、e alarm pull stations and the two exits nearest your room.Fire AlarmsThe floors of all campus buildings are equipped with manual (手动的) fire alarm systems which include fire alarm pull stations and pipes.Most are also equipped with automatic fire alarm systems consisting of heat detectors，smoke detec
43、tors and sprinklers.For your safety，never tamper with(胡乱摆弄)these systems.False fire alarms are illegal and may lead to imprisonment.Fire DrillsA fire drill will be conducted in your residence hall every semester.During a fire drill，please do the following：Take your room key and ID，close and lock the
44、 door to your room.Exit immediately from the nearest emergency exit；do not use a lift.Meet outside of your residence hall and wait for further instructions.Fire ExtinguishersFire extinguishers are located on each floor and in each apartment.Use a fire extinguisher only if you have been trained to do
45、 so.Irresponsible use of a fire extinguisher can create a dangerous situation for other residents and could result in damage to personal property.Misuse of a fire extinguisher will result in fines.Smoke DetectorsA smoke detector is on the ceiling in your room.Some buildings also have heat detectors
46、on the ceilings.Do the following to ensure the safe operation of your smoke detector：If your smoke detector is working properly，the red light should be on.If the red light is not blinking (闪动)，contact residence hall staff immediately.Do not cover or block your smoke detector in any way.If a smoke de
47、tector sets off an alarm and there is no fire or smoke，inform your hall staff.【语篇解读】本文是一篇说明文。文章主要向大学生们介绍了火灾预防的相关情况：火警、消防演练、灭火器以及烟雾探测器等。1What is the main duty of the fire prevention professionals?ATo provide parttime jobs for students.BTo lead the students to the nearest exits.CTo check and maintain
48、fire prevention equipment.DTo train teachers to be fire prevention professionals.解析：细节理解题。根据Fire Prevention Information下的第二句“They inspect.and test and maintain all sprinkler systems.”可知，火灾预防专家们的主要职责是检测和维护火灾预防设备。故选C。答案：C2What do the automatic fire alarm systems include?APipes and smoke detectors.BSmo
49、ke detectors and sprinklers.CFire alarm pull stations and pipes.DSprinklers and fire alarm pull stations.解析：细节理解题。由题干中的automatic fire alarm systems可定位到Fire Alarms下的“.automatic fire alarm systems consisting of heat detectors，smoke detectors and sprinklers.”。故答案选B。答案：B3In a fire drill，the students sho
50、uld_Arush quickly to a liftBgather at the nearest exitCshut the door and leave at onceDwait for instructions in the hall解析：细节理解题。根据Fire Drills下的第一条以及第二条可知，选项C符合题意。答案：C4What do we know about the use of fire extinguishers?AUsing them wrongly results in punishment.BIrresponsible use of them can damage
51、them.CImproper use of them can destroy the apartment.DUsing them without a trainer present is forbidden.解析：推理判断题。根据Fire Extinguishers下的最后一句“Misuse of a fire extinguisher will result in fines.(错误使用灭火器会导致罚款)”可知A项正确。答案：A .七选五根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。Top tips to be safe while travelling
52、aloneYou can be safe while travelling alone if you follow the tips below：_1_ Travelling is quite distracting (令人分心的) and thus you are likely to leave behind one or two items on the caf table or in the restaurant.Losing your credit cards or even your jacket can create trouble for you.Separate all sou
53、rces of money.Are you in the habit of carrying all sources of money together? Never do that while travelling._2_ It is better not to carry them all in person.If you lose your cards on the way，it is difficult to get replacements._3_ Conduct research on the destination before you pack your bags and st
54、art travelling.Use online information to find how safe the place is.Find whether there will be any festival during that time.No doubt these events are great，but you need to remember that if you do not book hotels in advance，you may fall into trouble in festive seasons.Avoid cultural mistakes.Every d
55、estination has its own specific set of traditions and customs.Travelling is one of the best ways to learn more about tradition and culture，but take steps not to make cultural mistakes._4_Note all local emergency numbers._5_ Save the number of your embassy if you are travelling abroad，the local polic
56、e，fire stations and the nearest medical facilities.AChoose destinations with care.BNever carry your wallet in your back pocket.CKeep at least one of them in a different place.DMake a habit of looking back as often as you can.EYou need to have some contact numbers stored in your phone.FBeing without
57、money is certainly not fun when travelling alone.GEven if a gesture appears normal to you，it may not seem so to the locals.【语篇解读】本文为说明文，题材为日常生活类。本文介绍了独自旅行时应注意的安全事项。1解析：本段提到了旅行时容易分心而落下东西，造成麻烦，由此可知要养成回头检查是否落下东西的习惯。答案：D2解析：C项中的them指代上文中的“all sources of money”，承接上句说明至少要把一个能获得钱的来源放到不同的地方。答案：C3解析：本空为本段的主旨
58、句。由本段内容可知，要仔细选择旅行目的地。答案：A4解析：G项承接上句并与本段的主旨呼应，用来举例说明在平时旅行时可能会犯的文化错误。答案：G5解析：E项对主旨句展开说明，起到承上启下的作用。指出你需要在手机中储存一些联系号码。答案：E.完形填空阅读下面短文，从短文后各题所给的四个选项(A、B、C和D)中，选出可以填入空白处的最佳选项。(2018全国卷)Two weeks earlier，my son，Ben，had got in touch.Hed moved to England with his mum when he was three and it had been 13 years
59、 since Id _1_ seen him.So imagine my _2_ when he emailed me saying he wanted to come to visit me.I was _3_！I arrived early at Byron Bay where we were supposed to _4_The bay was _5_ in sunshine，and there was a group of kayakers around 150m off the shore.Getting a little _6_，I realized one kayak(皮划艇)
60、was in _7_“Somethings not _8_！”I took off my Tshirt and _9_ into the water.I saw there were two instructors on board and a man lying across the middle.He was _10_ violently.Linking arms with one of the instructors，I helped _11_ the young man out of the water.He was unconscious and as I looked at his
61、 face，something _12_ to me.Those brown eyes were very _13_.“Whats his name？”I asked the instructor.“Ben，”he replied，and immediately I _14_That stranger was my son!The instructors called for an ambulance._15_，after a brief stay in hospital，Ben was well enough to be allowed to _16_ and later the famil
62、y met up for dinner.We chatted about everything and then Ben _17_ to me.“I just want to say thank you，”he said.“You _18_ my life！”I still cant believe what a _19_ it was.Im just so glad I was there _20_ to help my son.【语篇解读】本文是一篇记叙文。作者到约定的地方去见自己13年没见面的儿子，却在那里遇到有人溺水。作者下水救人，出乎意料的是，得救的年轻人正是作者的儿子。1A.als
63、oBoftenCeven Dlast解析：前文说作者的儿子本3岁时就离开了作者，因此这里表示“自从我上次见他到现在已经13年了”，用last表示“上次”。答案：D2A.delight BreliefCanger Dworry解析：前文提到作者已经13年没见过自己的儿子了，因此儿子发来电子邮件，说要来看望作者，作者应该感到高兴(delight)。答案：A3A.scared BshockedCthrilled Dashamed解析：13年未见的儿子要来看望作者，作者感到高兴，因此选thrilled表示“激动的”，后面的arrived early也是提示。答案：C4A.talk BstayCmeet
64、 Dsettle解析：前文提到作者的儿子要来看望自己，因此作者来到他们约定见面(meet)的地方。答案：C5A.bathed BcleanCdeep Dformed解析：此处意为“海湾沐浴在阳光中”。be bathed in“沐浴在中”。答案：A6A.faster BcloserCheavier Dwiser解析：上文提到这些皮划艇离岸边约有150米远，下文提到作者注意到有意外的情况发生，因此这里用get closer，表示“走得更近一些”。答案：B7A.trouble BadvanceCquestion Dbattle解析：下文提到作者把那个年轻人从水里救出来时，那个年轻人昏迷不醒，由此判断
65、选A项in trouble，表示有麻烦的。答案：A8A.real BrightCfair Dfit解析：上文提到有一艘皮划艇有麻烦，因此这里用somethings not right表示“有情况不对劲”。答案：B9A.stared BsankCdived Dfell解析：上文提到作者脱掉T恤衫，下文提到到水里去(into the water)，因此这里表示作者跳进(dive)水里救人。答案：C10A.arguing BfightingCshouting Dshaking解析：上文提到作者跳进水里，下文提到那个年轻人昏迷不醒，因此这里表示年轻人在水中浑身剧烈地颤抖，选shaking。答案：D11
66、A.lead BpersuadeCcarry Dkeep解析：根据上文的“linking arms with”和下文提到的“out of the water”可知，作者和一个教练员双臂连接，帮着把那个年轻人从水里救到岸上，用carry表示“抬”。答案：C12A.happened BoccurredCapplied Dappealed解析：下文提到被救的年轻人正是作者13年没见面的儿子，因此这里表示作者看着昏迷不醒的年轻人，突然想起一些事，用sth occurs to sb表示“某人突然想到某事”。答案：B13A.sharp BpleasantCattractive Dfamiliar解析：下文
67、提到被救者是作者的儿子，因此这里表示在作者眼里，对方的褐色眼睛看起来是很熟悉的(familiar)。答案：D14A.agreed BhesitatedCdoubted Dknew解析：上文提到作者对这个年轻人的褐色眼睛很熟悉，教练告诉作者这个人的名字是本，于是作者马上知道(know)了。答案：D15A.Fortunately BFranklyCSadly DSuddenly解析：下文提到本在医院里待了很短的时间就康复了，这是幸运的(fortunately)事。答案：A16A.return BrelaxCspeak Dleave解析：上文提到本在医院里待了很短的时间(a brief stay)身
68、体就恢复健康了(well enough)，这里表示他可以出院了(leave)。答案：D17A.joked BturnedClistened Dpointed解析：上文提到作者和儿子聊天的时候无所不谈(chat about everything)，下文提到儿子表达对作者的感激之情，因此这里表示本转向(turn to)作者要对他说话。答案：B18A.created BhonouredCsaved Dguided解析：上文提到作者帮助教练把本从水中救上来，故此处选save表示“挽救，救”。答案：C19A.coincidence BchangeCpity Dpain解析：从故事情节的发展来看，作者去与13年没见面的儿子会面，结果在水中救起溺水者，这个溺水者正是自己的儿子，这简直太巧了。故选coincidence，表示“巧合的事”。答案：A20A.on board Bin timeCfor sure Don purpose解析：这里表示作者感慨自己及时出现在事故现场救了自己的儿子，因此选in time表示“及时”。答案：B