必修1 Unit 4 第1课时 固基•语言知识(课件PPT)-【新高考方案】2027年高考英语一轮总复习（人教版）

该高中英语高考复习课件聚焦“自然灾害”主题，覆盖词汇（如affect, ruin, shock）、语法（非谓语动词、定语从句）、阅读（词义猜测、推理判断）、写作（慰问信、主题表达）等核心考点，依据高考评价体系分析近五年真题，明确词汇辨析占30%、语境应用占45%的高频考点分布，构建“基础自查-重点深化-题型训练”的备考体系。 课件亮点在于“真题融入+语境训练+易错突破”策略，如重点词汇affect结合2023新高考Ⅰ卷写作实例解析“be affected by”用法，完形填空通过2026湖北模拟题训练逻辑推理能力，易错点（如rescue短语、breath/breathe词性）专项警示，培养学生语言能力和学习能力，助力学生掌握答题技巧，教师可据此精准教学，提升复习效率。

UNIT 4 NATURAL DISASTERS “教材单元语基背诵与默写”见学生用书《语基背诵与默写》 课前先过“识记关”哦! (单击进入) 1 |主|题|语|境|建|构| 第1课时　固基·语言知识 目录 基础词汇•自查自纠 随堂训练•语境活用 重点词汇•深化学习 课时作业评价 01 02 03 04 基础词汇•自查自纠 5 Ⅰ.单词拼写 1.A wealthy man came to our ________ (营救) with a generous donation. 2.The traffic accident resulted from the driver’s carelessness， resulting in the ______ (死亡) of 3 people. 3.The people in the earthquake⁃stricken area were in need of food， medicine and ________ (避难处). 4.The _________ (山体滑坡) was caused by the heavy rain that had fallen over the past week. rescue death shelters landslide 5.As we all know， a tornado can _______ (摧毁) homes and even cause individuals to die. 6.Too much drinking will ________ (损害) your health， especially when you have a cold. 7.I have dreamed of this place and wondered what it would be like to ________ (呼吸) the air here. 8.His strong voice on the issue has helped _______ (统一) the suggestions. destroy damage breathe unify Ⅱ.单句语法填空 1.He made a great effort to save the girl _________ (trap) in the burning house. 2.They can bring their own lunches and eat them there ____the open air. 3.She _________(breath) a sigh of relief when she found her key.  4.When the storm hit， ___________ (electric)went out， leaving us in darkness. trapped in breathed electricity 5. Compared with those who are engaged in manual labor， teachers experience more mental __________ (suffer). 6.The old teacher’s ________ (wise)， which comes from years of teaching， guides students to solve problems wisely.   7.Without tools， we felt __________ (power) to move the heavy stone that blocked the path to our village.  8.The workers plan to __________ (length) the road that connects the village to the town， making travel easier for everyone. sufferings wisdom powerless lengthen 易错微点 1.come to one’s rescue 是地道的固定搭配，强调 “及时救助” 的含义，不可随意拆分或替换介词。rescue作动词时的短语rescue sb. from sth.意为“把某人从……中解救出来”。 2.breath为名词，breathe为动词，仅一字母只差，词性却不同。breathe a sigh of relief意为“松了口气”。 3.suffer用作及物动词时，表示“遭受；蒙受”，其后常接pain， defeat， poverty， hunger， punishment， hardship， loss， damage等名词作宾语。suffering 为名词，意为“疼痛；苦难；痛苦”。 Ⅲ.语境辨义(将对应词义的代码填在横线上) 1.flood A.n.洪水　　　　　　 B.n.大量(生义) C.vi.淹没 D.vi.大量涌入(生义) E.vt.使灌满水 F.vt.淹没 ①The villagers were frightened to see that the river would burst its bank and flood their homes. 　 ___　  ②Without the reservoir， there would have been a terrible flood.___　  F A ③The field flooded after the heavy rain.　 ____  ④They could suddenly afford to buy household goods thanks to a flood of imports from another country.　 ____   ⑤I felt happiness and relief flooding over me after my son came home from the front.　 ____   ⑥The heavy rainfall flooded the city streets， making it difficult for cars to pass.　 ____   C B D E 2.deliver A.v.递送　 B.v.生(小孩)(生义)　 C.v.发表 ①She has been delivered of a healthy boy.　____　  ②I’m having some flowers delivered for her birthday.　____ ③I feel greatly honoured to deliver a lecture on genetic engineering here.　____　 B A C 3.context A.n.上下文　 B.n.语境　 C.n.背景(生义) ①Here’s one possibility: The word “marriage” means different things in different contexts.　 ____ ②In this course we hope to look at literature in the frame of its social and historical context.　 ____   ③You should be able to guess the meaning of the word from the context.　 ____  B C A 4.wave A.n.海浪；波浪 B.n.挥手 C.vi.& vt.挥手 D.vi.& vt.招手(生义) ①He gave a wave before getting on the bus.　____　  ②When he saw his friend in the crowd， he waved to get his attention.__ ③The waves at the beach were huge， perfect for surfing.　____　  ④She waved goodbye to her friends as she left school. 　____  B D A C 重点词汇•深化学习 1.affect vt.影响；(疾病)侵袭；深深打动 ①(“慰问信”范句)Learning that you have returned to Ireland because ___________________________________， I am terribly sorry about it.得知你由于感染了重病而回爱尔兰，我非常抱歉。  ②Many young people were affected by his story. They began to do voluntary work for the disabled. →____________________， many young people began to do voluntary work for the disabled.(用分词短语作状语合并句子)  you are affected with a serious illness Affected by his story ③(2023·新高考Ⅰ卷写作)Furthermore， random grouping could result in language skill gaps within the groups， which could ________ ____________ of practicing oral skills. 此外，随机分组可能会导致小组内的语言技能差距，这可能影响口语技能练习的效果。  affect the effectiveness (1)be affected by　 受……的影响；被……感动 be affected with 感染……疾病 (2)affection n. 喜爱；感情 have affection for 喜爱；钟爱 (3)effect n. 影响；效果 have an effect on 对……产生影响 2.ruin n.& vt.破坏；毁坏n.废墟 ①The news of their hometown being reduced to ______ (ruin) spread across social media， filling everyone with sorrow. ②After the storm passed， the village ____________， with shattered roofs and uprooted trees everywhere.  风暴过后，村庄变成了废墟，到处都是破碎的屋顶和连根拔起的树木。 ruins lay in ruins ③(写作话题:健康生活)Regularly consuming junk food can _____ ____________ over time.  经常食用垃圾食品可能会逐渐损害一个人的健康。 ruin one’s health (1)lie/be in ruins　　　 成为废墟 be reduced to ruins 沦为废墟 (2)ruin oneself 毁掉自己；自取灭亡 ruin one’s health/fame/image/future 毁掉某人的健康/声誉/形象/前途 3.shock n.震惊；令人震惊的事；休克vt.(使)震惊 ①(语段串练)It was ___ great shock to me， a high school student， when I failed my math test. I was shocked __________ (realize) how much I had overlooked in my studies.  ②(心理描写)______________________________________ ， I was at a loss what to say.  意想不到的客人和礼物让我大吃一惊，一时竟不知该说什么。 a to realize Shocked at the unexpected guest and gift ③(2023·新高考Ⅰ卷写作)I simply ___________________， and my feet， as if rooted to the ground， couldn’t move a bit.  我只是震惊地站在那里，脚好像扎根在地上一样，一动也不能动。 stood there in shock (1)a great shock to sb. 对某人来说是 极大的震惊 in shock　　　　　　 震惊；吃惊 (2)shocking adj. 令人震惊的 (3)shocked adj. 震惊的；惊讶的 be shocked at/by ... 对……吃惊 be shocked to do sth. 做某事很吃惊 4.bury vt.埋葬；安葬；掩埋；隐藏 ①(动作、情绪描写)Jennifer sat on the floor， ________________ ____________， and her body trembled as she softly began to cry.  詹妮弗坐在地板上，双手掩面，身体颤抖着，轻声地哭了起来。 burying her face in her hands ②(一句多译)我每天专心于读英文报并获得了丰富的知识。 →I _______________________ reading the English newspapers every day and I have gained abundant knowledge.  →________________________ reading the English newspapers every day， I have gained abundant knowledge.(分词短语作状语)  bury myself/am buried in Burying myself/Buried in 埋头于；专心于 (2)bury one’s face in one’s hands　　　 双手掩面 名师指津:be buried in=bury oneself in意为“埋头于；专心于”，在句中作状语，含有反身代词时动词bury用现在分词形式，反之用过去分词形式。 5.effort n.努力；艰难的尝试；尽力 ①(语段串练)When it comes to study， we all know that _____ effort， difficult problems will become easy， but _________ effort， even simple equations (方程式) can be challenging. So we need to spare no effort ________ (learn) knowledge well.  with without to learn ②(2025·全国Ⅱ卷写作)Please ______________________________ to finish it by next Friday， so we have enough time to polish the part that describes how athletes train in snowy fields.  请尽力在下周五前完成，这样我们就有足够的时间润色文中描述运动员在雪地训练的部分。 make an effort/efforts/every effort to do sth. 努力做某事 spare no effort to do sth. 不遗余力做某事 (2)with effort 努力地 without effort 毫不费力地；容易地 6.supply n.供应(量)；补给；[pl.]补给品vt.供应；供给 ①(语段串练)In our school， time seems to be ___ short supply， especially before exams. However， we have __ good supply of books and resources in the library， which helps us study effectively. ②(一句多译)此外，这次活动还为会员提供了一个参观一些博物馆的机会。 →In addition， the activity ______________________ a chance to visit some museums.  →Besides， the activity ___________________ members to visit some museums.  in a supplies members with supplies a chance to (1)in short supply　　 短缺 have a good supply of ... 备有许多…… (2) 为某人提供某物 联想发散:表示“为某人提供某物”的短语还有: ①provide sb. with sth.=provide sth. for/to sb. ②offer sb. sth.=offer sth. to sb. 7.survive vi.生存；存活vt.幸存；艰难度过 ①We will do everything in our power to help those _________(survive) in the tornado. ②After the storm， they had to survive ____ limited food and water. ③(升华主旨句)Life isn’t about _______________________；it’s about learning to dance in the rain.  生活不在于如何从暴风雨中幸存，而在于学会在雨中翩翩起舞。 survivors on how to survive the storm ④(细节描摹句)After the hurricane swept through the town，_______ ___________________________________________________________.  在飓风席卷这个小镇后，许多人努力存活下来。 it was a struggle for many people to survive/many people struggled to survive (1)survive on ...　 依靠……生存下来 survive ...by ... 比……多活了…… (2)survivor n. 幸存者 survival n. [U]幸存；[C]残存物 名师指津:survive 表示“幸存；幸免于难”时，是及物动词，因而不要加多余的介词in， from等。 8.strike vi.& vt.侵袭；突击；击打n.罢工；罢课；袭击 ①(语段串练)We ____________ (strike)by the volunteer， who helped the old man cross the busy street in the rain. His kindness struck a warm feeling _____ our hearts， making us want to follow his example.  ②(人物描写) ________________ Sarah’s kindness was something special and that she always spent time helping others with a smile.我突然想到，萨拉的善良真的很特别，她总是带着微笑花时间帮助别人。  were struck into It struck me that ③(2024·新高考Ⅰ卷写作)_____________________ was how different it felt to draw outside rather than in a classroom.  让我印象最深刻的是，在户外画画和在教室里画画感觉完全不同。 What struck me most (1)be struck by　 被……打动/迷住 strike ...into one’s heart 使……刻骨铭心 It struck sb. that ... 某人突然想起…… (2)be on strike 在罢工 go on strike 举行罢工 (3)striking adj. 引人注目的；突出的 联想发散:表示“某人突然想起……”的常用结构还有:It hit sb. that ...和It occurred to sb. that ...。 9.effect n.影响；结果；效果 ①(语段串练)The school’s new method for providing extra tutoring will __________ (effect) help students grasp complex subjects better. This will come ____ effect from next semester， ensuring more focused learning. ②As is known to all， since the policy _______________________ __________， the pollution has been greatly reduced.  众所周知，自从实行这项政策以来，污染大大减少了。 effectively into was put/brought/carried into effect ③(内蕴丰富句) It struck me that the beauty and peace of nature _____________________________ my well⁃being， bringing a sense of peace and refreshment. 我突然想到大自然的美丽和宁静对我的健康产生了深远的影响，给我带来了平静和焕发活力的感觉。  have a profound effect on/upon (1)come into/take effect　 生效；见效 have an effect on/upon 对……产生影响 bring/carry/put ...into effect 实施；使……生效/起作用 side effect 副作用 in effect 实际上；事实上 (2)effective adj. 有效的；有影响的；实际的 effectively adv. 有效地；实际上 10.come to an end结束；终结 ①As the economy was in decline， some people in the town had lost their jobs. Many of their families were struggling to make ______(end) meet. ②Our school decided to _____________ the waste of food in the cafeteria， and has implemented a series of measures.  我们学校决定杜绝食堂的食物浪费现象，并为此推行了一系列措施。 ends put an end to ③We must ____________________________________， not giving it up halfway.我们必须将这个实验进行到底，不要中途放弃。  ④(升华主旨句)After years of hard work and dedication， our journey __________________， but it is just the beginning of a new chapter in our lives.经过多年的努力和奉献，我们的旅程已经结束，但这只是我们生活中新篇章的开始。  carry the experiment through to the end has come to an end bring/put an end to sth.=bring/put sth.to an end　　 结束/终止某事 carry ...through to the end 将……进行到底 make (both) ends meet 使收支相抵；量入为出 by the end of 到……为止 in the end 最后；终于 随堂训练•语境活用 (根据课文内容，在空白处填入1个适当的单词或括号内单词的正确形式) Strange things happened before Tangshan earthquake. The well walls had deep cracks. Some ①_______ (smell) gas came out of them. Chickens and even pigs were too nervous ②_______ (eat). At 3:42 on the morning of 28 July 1976， everything began to shake. ③__ seemed as if the world were coming to an end! Soon the whole city lay ④___ ruins. Many people died or ⑤______________ (injure). Nearly everything in the city was destroyed. People were ⑥________ (shock) and wondered how long the disaster would last. The army sent soldiers smelly to eat It in were injured shocked to dig out those ⑦_____ were trapped and to bury the dead. Workers built shelters for ⑧__________ (survive).Water and food were taken to the city.Slowly， the city began to ⑨_________ (breath) again. With strong support from the government and the tireless efforts of the city’s people， ⑩____ new Tangshan was built upon the earthquake ruins.  who survivors breathe a 课时作业评价 Ⅰ.阅读理解 Suddenly Uncle Henry stood up.“There’s a cyclone coming， Em，” he called to his wife.“I’ll go to look after the stock.” Then he ran toward the sheds where the cows and horses were kept. Aunt Em dropped her work and came to the door.One sight told her of the danger close at hand.“Quick， Dorothy!” she shouted.“Run for the cellar (地窖)!” Toto jumped out of Dorothy’s arms and hid under the bed， and the girl started to get him.Aunt Em， badly frightened， threw open the trap door in the floor and climbed down the ladder into the small， dark hole.Dorothy caught Toto at last and started to follow her aunt.When she was halfway across the room there came a great roar (咆哮) from the wind， and the house shook so hard that she lost her footing and sat down suddenly upon the floor. Then a strange thing happened.The house circled around two or three times and rose slowly through the air.Dorothy felt as if she were going up in a balloon.It was very dark， and the wind blew wildly around her， but Dorothy found she was riding quite easily.After the first few twists and turns， the house tipped badly， and she felt as if she were being rocked gently like a baby in a cradle (摇篮).Toto did not like it.He ran about the room， now here， now there， barking loudly； but Dorothy sat quite still on the floor and waited to see what would happen. At last she inched over the swinging floor to her bed， and lay down upon it； and Toto followed and lay down beside her.In spite of the swinging of the house and the crying of the wind， Dorothy soon closed her eyes and fell fast asleep. 语篇解读:本文是一篇记叙文。文章讲述了当风暴来临时一家人风暴不同的反应。Em姨妈快速地寻找庇护所，Henry急忙去看家畜，Dorothy也没有慌张，而是灵活镇定地应对这场风暴。 √ 1.What does the underlined word “cyclone” in paragraph 1 probably mean? A.Hurricane.　　　　 B.Flood. C.Volcano. D.Earthquake. 解析:词义猜测题。根据第一段“There’s a cyclone coming， Em”和下文中提到的“the wind”，以及第三段中的“the house tipped badly， and she felt as if she were being rocked gently like a baby in a cradle (摇篮).”可推知，画线词cyclone指的是“风暴”，与hurricane词义相近。 √ 2.Why did Aunt Em go into the hole in the floor when the cyclone approached? A.To find the puppy Toto. B.To get tools to help Henry. C.To protect their fortune. D.To find shelter from the cyclone. 解析:推理判断题。根据第二段中的“Aunt Em， badly frightened， threw open the trap door in the floor and climbed down the ladder into the small， dark hole.”可知，风暴接近时， Em姨妈钻进地板下面的洞中，是为了在风暴来临时寻找庇护所。 √ 3.Which of the following is TRUE about Dorothy? A.She cried as loudly as a baby. B.She remained calm with Toto. C.She managed to control the house. D.She found herself flying in a balloon. 解析:细节理解题。根据倒数第二段 “Toto did not like it.He ran about the room ...but Dorothy sat quite still on the floor and waited to see what would happen.” 以及最后一段 “At last she inched over the swinging floor to her bed， and lay down upon it； and Toto followed and lay down beside her.”可知，这些都表明 Dorothy 在这种危险的情况下依然保持冷静，并且和 Toto 在一起。 √ 4.Which words can best describe Dorothy in the emergency? A.Curious and tired. B.Excited and nervous. C.Quick⁃thinking and calm. D.Afraid and frightened. 解析:推理判断题。根据第三段“It was very dark， and the wind blew wildly around her， but Dorothy found she was riding quite easily.”和最后一段“In spite of the swinging of the house and the crying of the wind， Dorothy soon closed her eyes and fell fast asleep.”可推知， Dorothy在风暴中，并不慌张，而是反应迅速、灵活镇定地应对这场风暴。 Ⅱ.完形填空 (2026·湖北黄冈模拟)After 17 days of tense rescue efforts， 41 construction workers trapped in a collapsed Himalayan tunnel were finally freed on Tuesday. The disaster　5　 on November 12 when part of a tunnel being built in northern India’s Uttarakhand state suddenly collapsed. Over 60 meters of broken rocks and metal debris 　6　 the exit， trapping the workers inside. Rescue teams immediately began 　7　 the blockage using heavy machinery， but progress faced repeated 　8　. A key American⁃made drilling machine broke down just meters away from reaching the trapped men last Friday， forcing workers to complete the final 　9　 by hand.  Uttarakhand Chief Minister Pushkar Singh Dhami　10　 at a press conference that all rescued workers showed no signs of serious injury. “Although medical teams prepared stretchers (担架)， many chose to 　11　 out on their own. Doctors will continue monitoring them， but no serious conditions have been reported，” he stated， praising the combined 　12　 of engineers， medical staff， and government departments.   Throughout the crisis， rescuers　13　　 contact with the trapped workers through a 53⁃meter pipe that delivered oxygen， food， and water. Doctors provided mental health guidance to help the men stay 　14　. Family members 　15　 every day at the tunnel entrance， praying for their safe return.  As a backup plan， engineers had started drilling downward through　16　 mountain areas. However， the original horizontal drilling plan 　 17　 succeeded. In the final stage， rescuers pushed a wide pipe through the cleared path， allowing the workers to escape 　18　.  The rescued laborers， all migrant workers from India’s less developed regions， demonstrated remarkable 　19　 during their 17⁃day underground experience.  语篇解读:本文是一篇新闻报道。文章主要讲述了印度北阿坎德邦隧道坍塌后，41名被困工人17天后成功获救。 √ 5.A.attacked B.struck C.started D.arrived 解析:根据上文“The disaster”和下文“when part of a tunnel being built in northern India’s Uttarakhand state suddenly collapsed”可知，此处指灾难突然发生。故选B。 √ 6.A.closed B.blocked C.disturbed D.destroyed 解析:根据下文“trapping the workers inside”可知，此处指岩石和金属碎片堵塞了出口。故选B。 √ 7.A.cutting through B.digging through C.drilling through D.breaking through 解析:根据下文“the blockage using heavy machinery”可知，此处指用重型机械钻穿堵塞物。故选C。 √ 8.A.dangers B.accidents C.risks D.setbacks 解析:根据下文“A key American⁃made drilling machine broke down just meters away from reaching the trapped men last Friday”可知，此处指救援进展多次受挫。故选D。 √ 9.A.division B.section C.journey D.attempt 解析:根据上文“A key American⁃made drilling machine broke down just meters away from reaching the trapped men last Friday， forcing workers to complete the final”和下文“by hand”可知，机器坏了，此处指手工完成最后一段。故选B。 √ 10.A.declared B.doubted C.imagined D.questioned 解析:根据下文“at a press conference that all rescued workers showed no signs of serious injury”可知，此处指首席部长在新闻发布会上宣布。故选A。 √ 11.A.run B.skip C.crawl D.slide 解析:根据下文“out on their own”可知，此处指许多人选择自己爬出来。故选C。 √ 12.A.effects B.efforts C.skills D. plans 解析:根据下文“of engineers， medical staff， and government departments”可知，此处指赞扬了工程师、医务人员和政府部门的共同努力。故选B。 √ 13.A.maintained B.lost C.built D.required 解析:根据下文“contact with the trapped workers through a 53⁃meter pipe that delivered oxygen， food， and water”可知，此处指救援人员与被困工人保持联系。故选A。 √ 14.A.quiet B.energized C.still D.calm 解析:根据上文“Doctors provided mental health guidance”可知，此处指帮助这些人保持镇静。故选D。 √ 15.A.met B.formed C.gathered D.stood 解析:根据下文“at the tunnel entrance， praying for their safe return”可知，此处指家属们聚集在隧道入口处。故选C。 √ 16.A.unusual B.uncommon C.uncertain D.unstable 解析:根据上文“As a backup plan”和下文“mountain areas”可知，此处指在不稳定的山区向下钻孔作为备用计划。故选D。 √ 17.A.ultimately B.suddenly C.possibly D.temporarily 解析:根据下文“succeeded. In the final stage， rescuers pushed a wide pipe through the cleared path， allowing the workers to escape”可知，此处指最初的横向钻探计划最终成功了。故选A。 √ 18.A.safely B.quickly C.freely D.bravely 解析:根据上文“In the final stage， rescuers pushed a wide pipe through the cleared path， allowing the workers to escape”可知，此处指让工人们安全逃脱。故选A。 19.A.kindness B.insight C.strength D.wisdom 解析:根据下文“during their 17⁃day underground experience”可知，此处指这些工人在17天的地下经历中表现出了非凡的毅力。故选C。 √ Ⅲ.语法填空 (2026·高三全国专题练习)China has developed a new firefighting drone (无人机)， and six drones were arranged in the air to extinguish (扑灭) the high⁃rise building 　20　 (cover) in smoke in a recent drill.  The huge fire was under control within 10 minutes and completely put 　21　 in less than 15 minutes. The firefighting drone can lift 25 kilograms of weight 　22　 rise to 100 meters within 10 seconds. “In the past， we only considered using drones 　23　 (individual) to extinguish a fire， which wasn’t ideal，” Mr Cao， head of the firefighting drone， told the press. By the same token， on some occasions 　24　 the fire truck cannot enter the scene quick enough， the drone can lift up the hose pipes 　25　 (save) time for the rescue. Drones 　26　 (work) in groups can quickly seize a large fire and improve the initial rescue efforts.  Drones have been adopted widely to help firefighters tackle burning buildings and wildland fires.They can 　27　 (send) to fire locations as scouts (侦察机)， using cameras with thermal imaging technology to help first responders in 　28　 (they) rescue efforts.“We plan to officially introduce the device to the public this year after improving its 　29　 (accurate) of controls and ability to work in groups，” Mr Cao added.  语篇解读:本文是一篇新闻报道。文章主要讲述了中国新开发的消防无人机在一次演练中的成功应用及其未来推广计划。 20.covered　考查非谓语动词。句中已有谓语动词were arranged，空处要用非谓语形式，动词cover与其逻辑主语the high⁃rise building之间为动宾关系，故应用动词的过去分词形式作后置定语，修饰the high⁃rise building。故填covered。 21.out　考查固定短语。put out意为“扑灭”，为固定搭配。故填out。 22.and　考查连词。lift 25 kilograms of weight和rise to 100 meters within 10 seconds是消防无人机的两个功能，为并列关系，故应用并列连词and连接。 23.individually　考查副词。空处修饰动词using，需用副词individually“单独地”，作状语，表示单独使用无人机。故填individually。 24.when　考查定语从句。空处引导定语从句，修饰先行词occasions，先行词在从句中作时间状语，故用关系副词when引导从句。 25.to save　考查非谓语动词。设空处所在句中已有谓语can lift up，且设空处与谓语之间无连词连接，故此处应用非谓语动词。结合句意可知，“举起水管”的目的是“节约救援时间”，故应用动词不定式作目的状语。故填to save。 26.working　考查非谓语动词。设空处所在句中已有谓语can seize，且设空处与谓语之间无连词连接，故此处应用非谓语动词。动词work与其逻辑主语Drones之间为主谓关系，应用现在分词working作后置定语修饰Drones。故填working。 27.be sent　考查动词的语态。设空处在句中作谓语，动词send与其主语They之间为动宾关系，故应用动词的被动语态；结合空前的情态动词can可知，此处为含情态动词的被动语态，be动词应用原形。故填be sent。 28.their　考查代词。设空处修饰空后的名词词组rescue efforts，作定语，故应用形容词性物主代词。故填their。 29.accuracy　考查名词。设空处作动词improving的宾语，且前有形容词性物主代词its修饰，故应用名词形式accuracy“精确性；准确度”。 $