Unit 5 A delicate World Understanding ideas 课件-2024-2025学年高二英语外研版（2019）选择性必修第二册

Unit 5 A delicate world The content of this unit is about protecting our delicate脆弱的 planet. Through the learning of this unit，we will realize that human’s survival生存 have to depend on good natural ecosystem自然生态系统，protecting ecology生态 is protecting human and we should be in harmony with nature与大自然和谐相处. MACQUARIE ISLAND: from Chaos to Conservation Read and match the main idea with its corresponding paragraph. A. The rabbit problem resulted in parakeets' dying out. B. The rat, mouse and rabbit problem made people realise that problems should be solved once and for all. C. I participated in a programme to tackle this very problem. D. Native inhabitants on Macquarie Island were once in perfect harmony with their natural habitat. E. People released a virus to kill rabbits and used traps and dogs to catch the cats. F. Rats and mice brought to the island caused harm. Fast reading Read and match the main idea with its corresponding paragraph. A. The rabbit problem resulted in parakeets' dying out. B. The rat, mouse and rabbit problem made people realise that problems should be solved once and for all. C. I participated in a programme to tackle this very problem. D. Native inhabitants on Macquarie Island were once in perfect harmony with their natural habitat. E. People released a virus to kill rabbits and used traps and dogs to catch the cats. F. Rats and mice brought to the island caused harm. Fast reading 1. What can we learn from the first paragraph1? A. Macquarie Island isn’t a UNESCO World Heritage Site. 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. Macquarie Island lies in the North-west Pacific Ocean. Careful reading 1. I am standing on Macquarie Island, in the South-west Pacific Ocean, halfway between Australia and Antarctica.Strong winds and stormy seas have helped sculpt its long, thin shape. The green grass and bare光秃的 rock of its landscape景观 contrast对比 dramatically剧烈的, giving it a wild狂野的 and natural beauty. No visitor would think it surprising that the island is a UNESCO World Heritage Site. Nor would they fail to imagine how its native inhabitants, including royal penguins, king penguins, and elephant seal, existed in perfect harmony with their natural habitat for thousands of years. 1. What can we learn from the first paragraph1? A. Macquarie Island isn’t a UNESCO World Heritage Site . 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. Macquarie Island lies in the North-west Pacific Ocean. Careful reading 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. 2. But the island's more recent history tells a different story. It's a tragic story that began in 1810 when humans arrived on the island. In their ships they unknowingly brought rats and mice. These small animals quickly took over the island, eating the birds' eggs and attacking baby birds. Cats were brought to the island to control控制 the rats大鼠 and mice小鼠. Unfortunately, the cats subsequently developed an appetite for the birds, too. 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. 3.What was the cause of soil erosion according to the passage? A. Rabbits were introduced to the island, multiplying rapidly and digging holes. B. Parakeets, native to the island,died out because of humans’activities. C. The increasing number of cats led to more cats hunting the birds. D. Rats and mice multiplied rapidly and dug holes without cats. 3.Meanwhile, rabbits were introduced to the island as a source of food for humans. Loose不受束缚的 on the island, they did what rabbits do best - they multipled繁殖 rapidly快速地 and began eating the native vegetation植被 and digging holes挖洞, which caused soil erosion土壤侵蚀. The exploding rabbit population provided plentiful food for the cats, meaning that the number of cats also increased. This in turn led to more cats hunting the birds. The end result was that parakeets, once large in number and native to the island, died out in 1891. 3.What was the cause of soil erosion according to the passage? A. Rabbits were introduced to the island, multiplying rapidly and digging holes. B. Parakeets, native to the island,died out because of humans’activities. C. The increasing number of cats led to more cats hunting the birds. D. Rats and mice multiplied rapidly and dug holes without cats. 4. Which method方法 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 delivered onto the island. D. A large number of cats were released. 4.Even after Macquarie Island became an official nature reserve in the 1970s, the rabbis remained out of control. Experts felt it nccessary to come up with想出 a plan to remove去除 all the rabbits from the island. With this goal in mind, a virus病毒 was released释放，投放 onto the island. But although the virus caused the rabbit population to decrease from 1 30,000 to around 10,000, it also meant less food for the cats. The rats in consequence turned their attention - and their stomachs - back to the native birds, killing up to 60,000 each year. In the 1980s，traps and dogs were used to catch the cats. The last Macquarie Island cat was caught in 2000. 4. Which method方法 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 delivered onto the island. D. A large number of cats were released. 5.What caused death of a number of penguins? A. The departure of the cats from the island. B. The increasing population of mice and rats. C. The digging of the rabbits led to some land to collapse. D. The death of a number of parakeets. 5.But as the saying goes,“While the cat's away, the mice will play." With the departure of the cats from the island, the mouse and rat population started to increase. And remember those 10,000 or so rabbits? It turned out that they developed an immunity to the virus, and their numbers exploded once again. Then, in 2006, the rabbits' digging挖掘 caused some land to collapse坍塌, and killed a substantial number of大量的 penguins企鹅. This incident made it clear that the rat, mouse and rabbit problem needed solving once and for all. 5.What caused death of a number of penguins? A. The departure of the cats from the island. B. The increasing population of mice and rats. C. The digging of the rabbits led to some land to collapse. D. The death of a number of parakeets. 6. Why did the author come to Macquarie Island? 6.So, I am here on Macquarie Island to participate in参与 the programme to tackle解决 this very problem. The first step involved poison being dropped from helicopters. The next step is to remove the last remnaining invading species, 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 intervention is a long, much delayed ending to a sad story, but we humans owe it to the island to give it a happy ending. 6. Why did the author come to Macquarie Island? To participate in a programme to tackle the problem. 7. What is your understanding of ''…we humans owe it to the island to give it a happy ending'' in the last paragraph? 6.So, I am here on Macquarie Island to participate in参与 the programme to tackle解决 this very problem. The first step involved poison being dropped from helicopters. The next step is to remove the last remnaining invading species, 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 intervention干预 is a long, much delayed耽搁 ending结局 to a sad story, but we humans owe欠 it to the island to give it a happy ending. 7. What is your understanding of ''…we humans owe it to the island to give it a happy ending'' in the last paragraph? Before humans arrived, all the living things on the island existed in perfect harmony with their natural habitat for thousands of years. It was the arrival of humans that destroyed破坏 the ecological生态的 balance平衡, so we humans are responsible for restoring修复 it. 1. To analyse how Macquarie Island was saved保护 from destruction毁灭，破坏. 2. To inform告知 readers of the chaos混乱 caused on Macquarie Island by humans. 3. To entertain娱乐，使快乐 reader with a funny story about what happened on Macquarie Island. 4. To suggest ways in which an ecosystem生态系统 can be protected. Choose the author's purpose in writing this passage and give your reasons. Post reading Activity 4 28 Time(s) in 1810 Human arrived to live there brought rats and mice to eat bird’s eggs and attack baby birds. brought ___ developed an a________ for the birds, too introduced ____ to be a source of _____ for human cause soil _____ and parakeets _____ _____ in 1891 released ___ to _____ all the rabbits cats killed native birds ______ 60,000 each year ___________ ______ in the 1970s used ____ and dogs to _____ the cats increase the _________ of mouse and rat used ____ and dogs in the 1980s in 2006 to remove all the invading species declared pest-free and its ecology is on the road to recovery 宣布无有害生物，其生态正在恢复 Time(s) in 1810 Human arrived to live there brought rats and mice to eat bird’s eggs and attack baby birds. brought ___ developed an ________ for the birds, too introduced ____ to be a source of _____ for human cause soil _____ and parakeets ______ ______ in 1891 released ____ to _____ all the rabbits cats killed native birds ______ 60,000 each year ___________ ______ in the 1970s used ____ and dogs to _____ the cats increase the _________ of mouse and rat used ___ _ and dogs in the 1980s in 2006 to remove all the invading species declared pest-free and its ecology is on the road to recovery appetite food erosion died out virus remove up to traps catch population poison 宣布无有害生物，其生态正在恢复 The Actions caused disastrous effects on ecosystem. almost 200years cats rabbits （2022年·全国卷）你校将以六月八日世界海洋日为主题，举办英语征文比赛，请你写一篇短文投稿。 内容包括： 1. 海洋的重要性； 2. 保护海洋的倡议。 词数100左右； When it comes to ocean, its pollution is becoming more and more serious. World Ocean Day, falling on June 8th, is aimed at raising awareness of ocean conservation. Ocean plays a key role in our world. Not only does ocean offer us sufficient food, but also it maintains the balance of nature. Thus, it is imperative to protect ocean. First of all, what we can do is to place importance/vital on our daily actions. For example, garbage can’t be thrown into ocean. What’s more, we can also hand out leaflets to call on more people to protect the ocean. The more people are involved, the better the ocean environment is. All in all, it is high time that we devoted ourselves to protecting ocean. To protect ocean is to protect ourselves. Example $$