Unit 5 Period 2 Using language（分层作业）英语外研版2019选择性必修第一册

Unit 5 Revealing nature Period 2 ：Using language分层练习 基础达标 01 能力提升 02 拓展培优 03 一、基础巩固 1. 用所给动词的过去完成时填空 1.By the time I arrived at the party, everyone else _________________（leave）. 2.She told me that she ________________（see）the movie before. 3.They ________________（not finish）their homework when the teacher asked for it. 4.He ________________（work）in the company for five years before he moved to another city. 5.I realized that I ________________（lost）my keys after I got home. 2. 单项选择 1.When I got to the station, the train______already______. A. has; left B. had; left C. was; leaving D. would; leave 2.She said she______the principle already. A. has seen B. saw C. will see D. had seen 3.Before he______to the meeting, he______a lot about it. A. came; had heard B. comes; has heard C. came; hears D. comes; heard 3. 根据中文提示完成句子 1.到上学期末，我们已经学习了2000个英语单词。 By the end of last term, we________________2,000 English words. 2.她在出国之前已经在这所学校教了十年书。 She________________in this school for ten years before she went abroad. 3.我到达电影院时，电影已经开始15分钟了。 When I got to the cinema, the movie________________for 15 minutes. 1. 阅读理解 Biodiversity, short for biological diversity, refers to the variety of life on Earth. It includes all organisms, species, and populations; the genetic variation among these; and all their complex assemblages of communities and ecosystems. However, biodiversity is facing a serious threat. The main reasons are habitat destruction, climate change, over - exploitation of species, and the spread of invasive species. For example, deforestation reduces the living space for countless animals and plants. As the climate changes, many species find it hard to adapt to the new temperature and precipitation conditions. Scientists have been trying to find ways to protect biodiversity. Some measures include setting up nature reserves, carrying out scientific research on endangered species, and promoting public awareness of the importance of biodiversity. Questions: 1.What does biodiversity refer to? 2.What are the main threats to biodiversity? 3.What measures are being taken to protect biodiversity? 2. 语法填空 A recent study （show）that the number of species （decrease）rapidly in the past few decades. Scientists （worry）about this situation for a long time. They （try）many ways to protect these species before they （come up with）the idea of building wildlife corridors. These corridors can connect fragmented habitats, allowing animals （move）freely. By the time the project （finish）next year, it （provide）a better living environment for many endangered animals. 3. 书面表达 假设你是李华，你的英国笔友Tom对生物多样性很感兴趣，写信向你询问相关情况。请你给他写一封回信，介绍生物多样性的重要性以及面临的威胁，至少80词。 1. 阅读理解 The Amazon rainforest, often called the “lungs of the Earth”, is home to an incredibly rich biodiversity. It contains millions of species of plants, animals, and insects. For instance, there are more than 400 species of mammals, 1,300 species of birds, and countless types of plants. But in recent years, the Amazon rainforest has been severely damaged. Large - scale deforestation for agriculture, logging, and urban expansion is taking place. This not only destroys the habitats of many species but also contributes to climate change. Scientists estimate that if the current rate of deforestation continues, a large number of species in the Amazon will become extinct within the next few decades. Some local communities and environmental organizations are fighting back. They are promoting sustainable forestry practices, protecting small - scale farmers' rights to the land, and conducting research to better understand the rainforest ecosystem. Questions: 1.Why is the Amazon rainforest called the “lungs of the Earth”? 2.What are the main causes of the damage to the Amazon rainforest? 3.What are some of the efforts to protect the Amazon rainforest? 2. 书面表达 以“Protecting Biodiversity: Our Shared Responsibility”为题写一篇短文，内容包括生物多样性的现状、面临的挑战、保护生物多样性的重要性以及我们可以采取的行动，150词左右。 1 / 9 学科网（北京）股份有限公司 $$ Unit 5 Revealing nature Period 2 ：Using language分层练习 基础达标 01 能力提升 02 拓展培优 03 一、基础巩固 1. 用所给动词的过去完成时填空 1.By the time I arrived at the party, everyone else _________________（leave）. 2.She told me that she ________________（see）the movie before. 3.They ________________（not finish）their homework when the teacher asked for it. 4.He ________________（work）in the company for five years before he moved to another city. 5.I realized that I ________________（lost）my keys after I got home. 答案：had left；had seen；hadn't finished；had worked；had lost 2. 单项选择 1.When I got to the station, the train______already______. A. has; left B. had; left C. was; leaving D. would; leave 2.She said she______the principle already. A. has seen B. saw C. will see D. had seen 3.Before he______to the meeting, he______a lot about it. A. came; had heard B. comes; has heard C. came; hears D. comes; heard 答案：B；D；A 3. 根据中文提示完成句子 1.到上学期末，我们已经学习了2000个英语单词。 By the end of last term, we________________2,000 English words. 2.她在出国之前已经在这所学校教了十年书。 She________________in this school for ten years before she went abroad. 3.我到达电影院时，电影已经开始15分钟了。 When I got to the cinema, the movie________________for 15 minutes. 答案：had learned/learnt；had taught；had been on 1. 阅读理解 Biodiversity, short for biological diversity, refers to the variety of life on Earth. It includes all organisms, species, and populations; the genetic variation among these; and all their complex assemblages of communities and ecosystems. However, biodiversity is facing a serious threat. The main reasons are habitat destruction, climate change, over - exploitation of species, and the spread of invasive species. For example, deforestation reduces the living space for countless animals and plants. As the climate changes, many species find it hard to adapt to the new temperature and precipitation conditions. Scientists have been trying to find ways to protect biodiversity. Some measures include setting up nature reserves, carrying out scientific research on endangered species, and promoting public awareness of the importance of biodiversity. Questions: 1.What does biodiversity refer to? 2.What are the main threats to biodiversity? 3.What measures are being taken to protect biodiversity? 答案: 1.It refers to the variety of life on Earth, including all organisms, species, populations, the genetic variation among these, and all their complex assemblages of communities and ecosystems. 2.The main threats are habitat destruction, climate change, over - exploitation of species, and the spread of invasive species. 3.Some measures include setting up nature reserves, carrying out scientific research on endangered species, and promoting public awareness of the importance of biodiversity. 2. 语法填空 A recent study （show）that the number of species （decrease）rapidly in the past few decades. Scientists （worry）about this situation for a long time. They （try）many ways to protect these species before they （come up with）the idea of building wildlife corridors. These corridors can connect fragmented habitats, allowing animals （move）freely. By the time the project （finish）next year, it （provide）a better living environment for many endangered animals. 答案：has shown；has been decreasing；have been worrying；had tried；came up with；is finished；will have provided 3. 书面表达 假设你是李华，你的英国笔友Tom对生物多样性很感兴趣，写信向你询问相关情况。请你给他写一封回信，介绍生物多样性的重要性以及面临的威胁，至少80词。 答案: Dear Tom, I'm glad to hear from you and learn that you're interested in biodiversity. Biodiversity is of great importance as it provides us with various resources like food, medicine, and clean water. It also helps maintain the balance of ecosystems. However, it's now in danger. Habitat destruction, climate change, and over - exploitation are the main threats. Many species are on the verge of extinction. We need to take action to protect it, such as protecting natural habitats and raising public awareness. Looking forward to your reply. Best regards, Li Hua 1. 阅读理解 The Amazon rainforest, often called the “lungs of the Earth”, is home to an incredibly rich biodiversity. It contains millions of species of plants, animals, and insects. For instance, there are more than 400 species of mammals, 1,300 species of birds, and countless types of plants. But in recent years, the Amazon rainforest has been severely damaged. Large - scale deforestation for agriculture, logging, and urban expansion is taking place. This not only destroys the habitats of many species but also contributes to climate change. Scientists estimate that if the current rate of deforestation continues, a large number of species in the Amazon will become extinct within the next few decades. Some local communities and environmental organizations are fighting back. They are promoting sustainable forestry practices, protecting small - scale farmers' rights to the land, and conducting research to better understand the rainforest ecosystem. Questions: 1.Why is the Amazon rainforest called the “lungs of the Earth”? 2.What are the main causes of the damage to the Amazon rainforest? 3.What are some of the efforts to protect the Amazon rainforest? 答案: 1.Because it is home to an incredibly rich biodiversity and plays a crucial role in maintaining the Earth's ecological balance, especially in terms of oxygen production. 2.The main causes are large - scale deforestation for agriculture, logging, and urban expansion. 3.Some efforts include promoting sustainable forestry practices, protecting small - scale farmers' rights to the land, and conducting research to better understand the rainforest ecosystem. 2. 书面表达 以“Protecting Biodiversity: Our Shared Responsibility”为题写一篇短文，内容包括生物多样性的现状、面临的挑战、保护生物多样性的重要性以及我们可以采取的行动，150词左右。 答案: Protecting Biodiversity: Our Shared Responsibility Biodiversity, the variety of life on Earth, is currently in a worrying state. Many species are on the verge of extinction due to various threats. Habitat destruction, mainly caused by human activities like deforestation and urbanization, is a major challenge. Climate change also disrupts ecosystems, making it difficult for many species to survive. Moreover, over - exploitation of natural resources and the spread of invasive species further worsen the situation. Protecting biodiversity is of vital importance. It provides us with essential ecosystem services such as clean air, water, and fertile soil. It also enriches our planet's natural beauty and cultural heritage. To protect biodiversity, we can start from small things in daily life, like reducing waste and using eco - friendly products. Governments should also make stricter laws to protect habitats and control pollution. Only by working together can we safeguard the future of biodiversity. 1 / 9 学科网（北京）股份有限公司 $$