2021版外研版必修一英语Unit 5　Understanding ideas学案二 学案 .docx

1、Period 2 Understanding ideas 学习目标 1.To master the key words and expressions with the help of the context. 2.To predict the source of the passage,sort out the relevant details,figure out the structure of the passage and learn to retell the passage. 3.To form correct views on protecting the wildlife.

2、自主预习 Fill in the blanks. 1.Many birds didnt s the severe winter. 2.I did e find what I was after. 3.The scientists want to locate the p of the gene on a chromosome(染色体). 4.It is wise to s help as soon as possible. 5.Cannes hosts the a film festival. 6.Life is too precious,so dont d it. 7.I can certa

3、inly feel the e of too many late nights. 8.First of all,my aim was to d what I should do next. 课堂探究 一、Before reading Task 1 Look at the pictures on Page 50 and answer the following two questions. 1.Which animals migrate? 2.What do you know about animal migration? 二、While reading Task 1 Read the pass

4、age quickly and choose the answer. Where are you most likely to find the passage? 1.In a scientific research paper about the monarch butterflys migration. 2.In a popular nature magazine introducing the monarch butterfly. 3.In a travel leaflet encouraging people to visit North America. Task 2 Read th

5、e passage carefully and fill in the blanks. The Monarchs Journey The purpose of the migration of animals They 1. to find food,a partner or in search of warmer weather. The monarchs difficult journey Every autumn,they begin a long and difficult journey,and manage to travel around 4,000 kilometres 2.

6、to find their way to places 3. they will spend the winter. The way the monarch migrates The monarch is able to tell the time of day,and use its eyes 4. the position of the sun.So,it can 5. which way it needs to go and change its 6. when necessary. The reason why therere fewer monarchs butterflies Pe

7、ople are destroying the natural environment by 7. trees and using 8. that kill the plants that monarch caterpillars eat. How to protect the monarch Volunteers have been working together to record its migration and make sure that there are enough plants for it to 9. The more we know about this lovely

8、 creature,10. the chance it will survive. 三、After reading Task 1 Analyse the structure of the passage. Choose the correct structure. A. B. C. D. Task 2 Try to retell the passage according to the hints. Task 3 Group discussion 1.What impresses you most about the monarch butterfly? 2.What can people d

9、o to help protect the monarch butterfly? 核心素养专练 一、Review the key points in the passage 二、Complete the passage Many animals move from one place to another at certain times of the year.They migrate 1. (find)food,seek a partner,or in search of warmer weather.One of the most wonderful migrations in natu

10、re is 2. of the North American monarch butterfly.Every autumn,3. (million)of these beautiful insects with fine black and orange wings begin a long and difficult journey.However,until recently no one knew 4. they did this.A team of scientists 5. (lead)by Professor Eli Shlizerman at the University of

11、Washington has found out that the monarch is able to tell the time of day by 6. (use)its eyes to measure the position of the sun,so that the monarch manages to reach the places 7. it will spend the winter.The solution 8. the mystery of the monarchs amazing ability comes at a time when it is in serio

12、us trouble.Its population 9. (crash)by as much as 90 per cent in the last few years because of human activity.The research on the monarchs behaviour has however led to 10. greater awareness of this creature.People have been working together to record its migration and make sure that there are enough

13、 plants for it to feed on. 参考答案 自主预习 1.survive 2.eventually 3.position 4.seek 5.annual 6.destroy 7.effect 8.determine 课堂探究 一、略 二、Task 1:2 Task 2:1.migrate 2.south 3.where 4.to measure 5.determine 6.direction 7.cutting down 8.chemicals 9.feed on 10.the greater 三、Task 1:A Task 2:略 Task 3:略 核心素养专练 二、1.to find 2.that 3.millions 4.how 5.led 6.using 7.where 8.to 9.has crashed 10.a