Unit 5 Period 2 课时练案 课文整体阅读(Understanding ideas)-【名师导航】2026-2027学年高中英语选择性必修第二册教师用书配套课件（外研版）

该高中英语课件围绕“自然环境的保护”主题，以麦夸里岛生态案例为核心，通过整体理解、细节理解及篇章结构分析，搭建从文章大意到深层逻辑的学习支架，帮助学生系统掌握阅读理解方法。 其亮点在于融合语言能力（词汇词块、长难句分析）、思维品质（多维探究问题）与文化意识（生态保护），如Task 3引导思考入侵物种影响，词汇部分积累写作佳句，助力学生提升综合语言运用能力，教师可高效开展主题式教学。

UNIT 5　A delicate world 主题语境 人与社会 —— 自然环境的保护 Period 2　课时练案 课文整体阅读 (Understanding ideas) √ Ⅰ．文章大意 What's the passage mainly about? A．Macquarie Island was saved from destruction． B．The chaos caused on Macquarie Island by humans． C．A funny story about what happened on Macquarie Island． D．The ways in which an ecosystem can be protected． Period 2　课时练案 课文整体阅读(Understanding ideas) Ⅱ．篇章结构 introduction brought introduced remove departure invading Period 2　课时练案 课文整体阅读(Understanding ideas) 1．What can we learn from the first paragraph? A．Macquarie Island is a UNESCO World Heritage Site because of its wild and natural beauty． B．The green grass and bare rock of its landscape on Macquarie Island form its beauty． C．Royal penguins，king penguins and elephant seals live in perfect harmony now． D．The writer is standing on Macquarie Island enjoying its wild and natural beauty． √ Period 2　课时练案 课文整体阅读(Understanding ideas) √ 2．What is mentioned in the passage? A．When humans arrived on the island，they hunted the birds on the island． B．So many rats and mice were brought to the island on purpose． C．Rats and mice have been taking over the island，eating the birds' eggs so far． D．Cats were introduced to the island to control the rats and mice． Period 2　课时练案 课文整体阅读(Understanding ideas) √ 3．What was the cause of soil erosion according to the passage? A．Rabbits were introduced to the island，multiplying rapidly，eating the native vegetation and digging holes． B．Parakeets，native to the island，died out because of human activities． C．The increasing number of cats led to more cats hunting the birds． D．Rats and mice multiplied rapidly and dug holes． Period 2　课时练案 课文整体阅读(Understanding ideas) 4．Which method to remove the rabbits from the island was used effectively in the 1970s? A．A large number of dogs were released． B．A large number of birds were released． C．A virus was released onto the island． D．A large number of cats were released． √ Period 2　课时练案 课文整体阅读(Understanding ideas) 5．What caused some land to collapse at the beginning of the 21st century? A．The departure of the cats from the island． B．The increasing population of mice and rats． C．The digging of the rabbits． D．The death of a number of penguins． √ Period 2　课时练案 课文整体阅读(Understanding ideas) 1．What's your opinion about invading species? ______________________________________________________________________________________________________________________ 2．Is it easy for destroyed nature to recover and why? ______________________________________________________________________________________________________________________ [答案]　略 Period 2　课时练案 课文整体阅读(Understanding ideas) Ⅰ．一词多义/熟词生义 1．multiply v．(使)大大增加，(使)倍增；繁殖；乘，乘以 ①(教材原句)Loose on the island，they did what rabbits do best—they multiplied rapidly and began eating the native vegetation and digging holes，which caused soil erosion． ____ ②Though the boy is 10 years old，he doesn't know that 2 multiplied by 4 makes 8． ________ ③Our problems have multiplied since last year． _____________________ 繁殖 乘，乘以 (使)大大增加，(使)倍增 Period 2　课时练案 课文整体阅读(Understanding ideas) 2．appetite n．胃口，食欲；渴望 ①(教材原句)Unfortunately，the cats subsequently developed an appetite for the birds，too． __________ ②Most children have an appetite for learning，which should be protected． ____ 3．Were you just going to trap her into making the decision？ _______ 4．Do you fear that you'll burst into tears or explode with anger in front of her? ___________________ 胃口，食欲 渴望 v．诱骗 v．(感情)爆发；迸发 Period 2　课时练案 课文整体阅读(Understanding ideas) Ⅱ．词块积累 1．_______________________ 到达岛上 2．_______________________ 占领该岛 3．__________________________________ 兔子的数量激增 4．______________ 原产于…… 5．________ 灭绝 arrive on the island take over the island the exploding rabbit population be native to die out Period 2　课时练案 课文整体阅读(Understanding ideas) 6．_____________________________ 一个官方自然保护区 7．_______________________ 制定一个计划 8．__________________________ 牢记这一目标 9．________________________________ 把它们的注意力转回…… 10．____________________________________ 一个悲伤故事的漫长而延迟的结局 an official nature reserve come up with a plan with this goal in mind turn their attention back to a long，much-delayed ending to a sad story Period 2　课时练案 课文整体阅读(Understanding ideas) Ⅲ．写作佳句 1．_________________________ have helped sculpt its long，thin shape． 强风和惊涛骇浪将海岛塑成现在狭长的形状。 2．The green grass and bare rock of its landscape contrast dramatically，____________________________． 绿草和光秃秃的岩石形成的景观反差巨大，使海岛呈现出一种狂野和天然的美。 Strong winds and stormy seas giving it a wild and natural beauty Period 2　课时练案 课文整体阅读(Understanding ideas) 3．No visitor would _______________ that the island is a UNESCO World Heritage Site． 这座岛是联合国教科文组织确立的世界遗产，游客们都认为名副其实。 4．________________ to imagine how its native inhabitants，including royal penguins，king penguins，and elephant seals，existed in perfect harmony with their natural habitat for thousands of years． 他们也不难想象出，数千年来，包括帝企鹅、王企鹅和象海豹在内的当地动物是如何与其自然栖息地完美地和谐共存的。 think it surprising Nor would they fail Period 2　课时练案 课文整体阅读(Understanding ideas) 5．But ________________，“While the cat's away，the mice will play．” 但正如俗语所说：“山中无老虎，猴子称大王。” as the saying goes Period 2　课时练案 课文整体阅读(Understanding ideas) Ⅳ．长难语句 1．Loose on the island，they did what rabbits do best—they multiplied rapidly and began eating the native vegetation and digging holes，which caused soil erosion． [分析]　此句为复合句。Loose on the island为形容词短语作____，逻辑主语为____；what引导____从句；which引导____________从句。 [翻译]　___________________________________________________ ___________________________________________________________ 状语 they 宾语 非限制性定语 由于在岛上放任其生存，兔子做了自己最擅长的事——飞 快地繁殖，它们开始吃当地植被并挖洞，造成了土壤侵蚀。 Period 2　课时练案 课文整体阅读(Understanding ideas) 2．The next step is to remove the last remaining invading species，and that's where I come in—with my dogs． [分析]　此句为复合句。where 引导____从句。 [翻译]　___________________________________________________ _____________ 表语 下一步是清除最后残存的入侵物种，这就是我的工作了—— 和我的狗一起。 Period 2　课时练案 课文整体阅读(Understanding ideas) Ⅴ．课文语法填空 Macquarie Island used to be a 1．__________(harmony) natural habitat with its native inhabitants． In 1810，humans arrived on the island，together with rats and mice which posed a huge threat to birds' eggs and baby birds．Cats were brought 2．__ the island to control the rats and mice．3．____________(unexpected)，they also grew to be fond of hunting the birds．At the same time，rabbits were introduced to the island as a source of food for humans．They reproduced rapidly，eating native plants and digging holes，4．_____ caused soil erosion．The number of cats increased with the explosion of the rabbit population．In turn，5．____(many) birds were hunted，eventually resulting in the extinction of parakeets． harmonious to Unexpectedly which more Period 2　课时练案 课文整体阅读(Understanding ideas) In the 1970s，the rabbits were out of control．Experts felt it necessary 6．__________(remove) all the rabbits from the island．Therefore，a virus was released onto the island．Although the virus was effective，it also meant less food for the cats，which turned their attention back to the native birds．In the 1980s，traps and dogs 7．_________(put) into use to catch the cats．With the departure of the cats from the island，the mice and rats started to increase．Meanwhile，there were still 10，000 or so rabbits which developed 8．__ immunity to the virus，and their numbers exploded once again． to remove were put an Period 2　课时练案 课文整体阅读(Understanding ideas) In 2006，a substantial number of penguins were killed in the collapse caused by rabbits' 9．_______(dig)．Consequently，a programme was launched to tackle the problem once and for all，aimed at removing the last 10．_________ (remain) invading species，and giving harmony back to the island．In 2014，Macquarie Island's ecology was finally on the road to recovery． digging remaining Period 2　课时练案 课文整体阅读(Understanding ideas) ①chaos n．大混乱；紊乱 ②halfway adj．中间的，半途的 adv．在……的中间；在中途；到一半 the halfway point/stage中间点/阶段 ③strong winds强劲的风；大风 high winds大风 Period 2　课时练案 课文整体阅读(Understanding ideas) light winds微风 ④stormy seas波涛汹涌的大海 ⑤sculpt v．[熟词生义] 使具有某种形状 ⑥contrast dramatically对比鲜明 contrast v．[熟词生义](靠近或作比较时)显出明显的差异，形成对比 contrast sharply相差甚远 dramatically adv．显著地；戏剧性地 ⑦heritage n．遗产；传统 ⑧fail to do sth．未能做某事 Period 2　课时练案 课文整体阅读(Understanding ideas) ⑨native inhabitants本土动物；本地居民 inhabitant n．[C]栖居的动物；居民 ⑩in harmony with...与……和谐相处 ⑪tell a different story说的情况迥然不同 story n．[熟词生义](真实情况的)叙述，描述 ⑫unknowingly adv．不知情地 ⑬rats and mice大大小小的老鼠 rat n．[C]大老鼠 mouse n．(pl．mice)老鼠，耗子 Period 2　课时练案 课文整体阅读(Understanding ideas) ⑭take over接管，接手；占领 ⑮subsequently adv．后来，随后 ⑯develop an appetite for...对……产生兴趣/食欲 appetite n．胃口，食欲 ⑰loose adj．不受约束，未束缚，自由 ⑱multiply v．繁殖；(使)大大增加，(使)倍增 ⑲explode v．突然增加 ⑳plentiful adj．大量的；众多的；充足的；丰富的 ㉑the number of...……的数量 Period 2　课时练案 课文整体阅读(Understanding ideas) ㉒in turn相应地，转而 take turns轮流 ㉓parakeet n．长尾(小)鹦鹉 ㉔in the 1970s 在20世纪70年代 ㉕out of control失去控制，无法管理 ㉖remove...from...使……从……消失 remove v．使消失，去除，排除 ㉗virus n．[C]病毒 the flu virus流感病毒 Period 2　课时练案 课文整体阅读(Understanding ideas) a virus infection病毒感染 ㉘release v．释放 ㉙decrease from...to...从……减少到…… decrease v．(使)变小，(使)减少 [反义词]increase v．(使)增长，增加 ㉚in consequence结果 ㉛up to达到(某数量、程度等) ㉜trap n．[C]夹子，陷阱 ㉝be used to do sth．被用来做某事 Period 2　课时练案 课文整体阅读(Understanding ideas) ㉞the departure from...从……离开 departure n．离开 ㉟turn out原来是；证明是；结果是 ㊱develop an immunity to...形成对……的免疫力 immunity n．免疫力 ㊲collapse v．倒坍；塌下 ㊳a substantial number of相当多的 substantial adj．大量的，多的 ㊴incident n．[C]事件 Period 2　课时练案 课文整体阅读(Understanding ideas) ㊵sth．needs doing某事需要被做 ㊶once and for all最终地，最后地；彻底地，一次了结地 ㊷tackle v．应付，处理，解决(难题或局面) ㊸very adj．[熟词生义](特指人或事物)正是的，恰好的，同一的 ㊹invading species入侵物种 invade v．(尤指造成损害或混乱地)涌入，侵袭 invasion n．涌入 ㊺intervention n．干预，介入 ㊻owe it to...to do sth．(认为)应该为……做某事 Period 2　课时练案 课文整体阅读(Understanding ideas) owe v．应该做；对……负有……的义务 ㊼postscript n．附言 ㊽pest-free adj．没有害兽/鸟/虫的 pest n．有害小动物；害虫 ㊾ecology n．生态 ㊿on the road to recovery走上复苏之路 recovery n．改善；回升；复苏 recover v．复原，恢复常态 Period 2　课时练案 课文整体阅读(Understanding ideas) MACQUARIE ISLAND： from Chaos①to Conservation I am standing on Macquarie Island，in the South-west Pacific Ocean，halfway② between Australia and Antarctica．Strong winds③ and stormy seas④ have helped sculpt⑤ its long，thin shape．The green grass and bare rock of its landscape contrast dramatically⑥，[1]giving it a wild and natural beauty．No visitor would think it surprising that the Period 2　课时练案 课文整体阅读(Understanding ideas) island is a UNESCO World Heritage⑦ Site．[2]Nor would they fail to⑧ imagine how its native inhabitants⑨，including royal penguins，king penguins，and elephant seals，existed in perfect harmony with⑩ their natural habitat for thousands of years． [1]此处为动词-ing形式短语作结果状语。 [2]本句为主从复合句。主句中，否定词nor位于句首，句子采用了部分倒装语序；how引导宾语从句，作imagine的宾语。 Period 2　课时练案 课文整体阅读(Understanding ideas) But the island's more recent history tells a different story⑪．[3]It's a tragic story that began in 1810 when humans arrived on the island．In their ships they unknowingly⑫ brought rats and mice⑬．These small animals quickly took over⑭ the island，[4]eating the birds' eggs and attacking baby birds．Cats were brought to the island to control the rats and mice．Unfortunately，the cats subsequently⑮ developed an appetite for⑯ the birds，too． Period 2　课时练案 课文整体阅读(Understanding ideas) [3]本句中的it指的是前面的a different story。that在此引导定语从句，修饰先行词a tragic story；该定语从句中又包含一个when引导的定语从句，修饰in 1810，when在此定语从句中作时间状语。 [4]此处的“eating the birds' eggs”和“attacking baby birds”是and连接的两个并列的动词-ing形式短语，在句中作伴随状语。 Period 2　课时练案 课文整体阅读(Understanding ideas) Meanwhile，rabbits were introduced to the island as a source of food for humans．Loose⑰ on the island，they did what rabbits do best—they multiplied⑱ rapidly and began eating the native vegetation and digging holes，which caused soil erosion．The exploding⑲ rabbit population provided plentiful⑳ food for the cats，meaning that the number of㉑ cats also increased．This in turn㉒ led to more cats hunting the birds．The end result was that parakeets㉓，once large in number and native to the island，died out in 1891． Period 2　课时练案 课文整体阅读(Understanding ideas) Even after Macquarie Island became an official nature reserve in the 1970s㉔，the rabbits remained out of control㉕．Experts felt it necessary to come up with a plan to remove all the rabbits from㉖ the island．[5]With this goal in mind，a virus㉗ was released㉘ onto the island．But although the virus caused the rabbit population to decrease from 130，000 to㉙ around 10，000，it also meant less food for the cats．The cats in consequence㉚ turned their attention—and their stomachs—back to the native birds，killing up to㉛ 60，000 each year．In the 1980s，traps㉜ and dogs were used to㉝ catch the cats．The last Macquarie Island cat was caught in 2000． Period 2　课时练案 课文整体阅读(Understanding ideas) [5]此处属于with复合结构，介词短语in mind作宾补，该结构在句中作状语。 Period 2　课时练案 课文整体阅读(Understanding ideas) [6]But as the saying goes，“While the cat's away，the mice will play．”With the departure of the cats from㉞ the island，the mouse and rat population started to increase．And remember those 10，000 or so rabbits? It turned out㉟ that they developed an immunity to㊱ the virus，and their numbers exploded once again．Then，in 2006，the rabbits' digging caused some land to collapse㊲，and killed a substantial number of㊳ penguins．This incident㊴ made it clear that the rat，mouse and rabbit problem needed solving㊵ once and for all㊶． [6]此处是as引导的非限制性定语从句，as代替后面的句子。 Period 2　课时练案 课文整体阅读(Understanding ideas) So，I am here on Macquarie Island to participate in the programme to tackle㊷ this very㊸ problem．The first step involved poison being dropped from helicopters．The next step is to remove the last remaining invading species㊹，and that's where I come in—with my dogs．They have been trained to find every last one，without harming the native animals．This intervention㊺ is a long，much-delayed ending to a sad story，but we humans owe it to the island to㊻ give it a happy ending． Postscript㊼：In 2014，Macquarie Island was declared pest-free㊽ and the island's ecology㊾ is finally on the road to recovery㊿． Period 2　课时练案 课文整体阅读(Understanding ideas) 麦夸里岛：从混乱不堪到精心保护 我正站在麦夸里岛上，这里位于太平洋的西南部，澳大利亚和南极洲的中间。强风和惊涛骇浪将海岛塑成现在狭长的形状。绿草和光秃秃的岩石形成的景观反差巨大，使海岛呈现出一种狂野和天然的美。这座岛是联合国教科文组织确立的世界遗产，游客们都认为名副其实。他们也不难想象出，数千年来，包括帝企鹅、王企鹅和象海豹在内的当地动物是如何与其自然栖息地完美地和谐共存的。 Period 2　课时练案 课文整体阅读(Understanding ideas) 但是，这座岛近些年的遭遇则是截然不同的故事。悲剧从人类1810年来到这座岛屿开始。他们不经意间随船带来了大鼠和小鼠。这些小动物很快就占领了岛屿，它们吃鸟蛋并攻击幼鸟。为控制鼠患，人们带来了猫，但不幸的是，猫随后也开始以鸟为食。 与此同时，人们把兔子引进岛上作为食物。由于在岛上放任其生存，兔子做了自己最擅长的事——飞快地繁殖，它们开始吃当地植被并挖洞，造成了土壤侵蚀。爆炸式增长的兔子数量给猫提供了充足的食物，这意味着猫的数量也增加了，相应地就有更多猫捕食鸟类。最终结果是，曾经数量众多的当地物种长尾小鹦鹉在1891年灭绝。 Period 2　课时练案 课文整体阅读(Understanding ideas) 即使在20世纪70年代麦夸里岛成为官方自然保护区后，兔子仍然不受控制。专家认为，必须想办法清除岛上所有的兔子。怀着这个目标，人们投放了一种病毒到岛上。然而，虽然病毒使得兔子的数量从130 000只降到约10 000只，但这也意味着猫的食物变少了。因此，猫把注意力和胃口重新转向了当地鸟类，每年捕食多达 60 000只。20世纪80年代，人们利用捕猎夹和狗来抓猫。2000年，麦夸里岛上的最后一只猫被抓。 Period 2　课时练案 课文整体阅读(Understanding ideas) 但正如俗语所说：“山中无老虎，猴子称大王。”猫从岛上消失了，小鼠和大鼠的数量便开始增加。还记得那10 000只左右的兔子吗？它们最终对病毒产生了免疫，数量又一次激增。随后，在2006年，兔子挖的洞造成一些土地坍塌，导致大量企鹅死亡。这一事件清楚地表明，大鼠、小鼠和兔子泛滥的问题需要一次彻底的解决。 Period 2　课时练案 课文整体阅读(Understanding ideas) 所以，正是为了解决这个问题，我来到麦夸里岛上参与一项行动。行动的第一步利用了直升机向岛上投放毒药。下一步是清除最后残存的入侵物种，这就是我的工作了——和我的狗一起。这些狗受训去寻找剩下的每一只老鼠和兔子，同时又不伤害当地动物。这次干预行动是这场悲剧漫长而屡被贻误的大结局，但这是我们人类应该做的，我们亏欠这座岛屿一个美好的结局。 附言：2014年麦夸里岛正式宣布已无有害生物，岛上的生态环境终于走上了恢复之路。 Period 2　课时练案 课文整体阅读(Understanding ideas) $