Unit 5 理解 课文精研读 教材讲解 2021-2022学年 外研版（2019）高中英语必修第一册

速读P50－51教材课文，完成下列任务：Ⅰ.阅读判断判断以下句子提供的信息是正确，还是错误，还是没有提及。1．Every spring，millions of monarch butterflies begin a long and difficult journey.A．Right.　　B．Wrong.　　C．Not mentioned.2．Until recently no one knew how monarch butterflies travel a long journey to the south and find their way to California or Mexico.A．Right.    B．Wrong.    C．Not mentioned.3．The monarch uses its eyes to measure the position of the sun.A．Right.    B．Wrong.    C．Not mentioned.4．Human activity is the only reason why the number of monarch butterflies is falling.A．Right.    B．Wrong.    C．Not mentioned.5．People have been working together to record the monarch's migration and make sure that there are enough plants for it to feed on.A.Right.    B．Wrong.    C．Not mentioned.[答案]　1－5　BAABAⅡ.补全信息选择正确选项填入空白处，补全所给句子提供的信息。A．to record its migration and make sure that there are enough plants for it to feed onB．to measure the position of the sunC．to find food，seek a partner，or in search of warmer weatherD．where the sun is in the skyE．where it will spend the winterF．where the butterfly can be found1．These two pieces of information—the time of day and the point ________—allow the butterfly to determine the way to go.2．Eventually，the monarch butterfly manages to reach the places ________．3．Many animals migrate ________．4．The monarch butterfly uses its eyes ________．5．People have been working together ________．[答案]　1－5　DECBAⅢ.表格填空The Monarch's JourneyThe purpose of animal migrationThey 1.migrate to find food，a partner or in search of warmer weather.Monarchs' hard migration Every autumn，they begin a long and difficult journey，and manage to travel around 4，000 kilometres 2.south and find their way to the places 3.where they will spend the winter.The way of monarchs'migrationThe monarch is able to tell the time of day，and use its eyes 4.to measure the position of the sun.So，it can 5.determine which way it needs to go and change its 6.direction when necessary.The reason why the number of monarch butterflies is fallingPeople are destroying the natural environment by 7.cutting down trees and using 8.chemicals that kill the plants that monarch caterpillars eat.How to protect the monarchs·Volunteers have been working together to record their migration and make sure that there are enough plants for them to 9.feed on．·The more we know about these delicate creatures，10.the greater the chance they will survive. 细读P50－51教材课文，完成下列任务：Ⅰ.主旨匹配1．Para.1 A．The main reason why the number of the  North American monarch butterflies falls.2．Para.2     B．The prediction about the North American monarch butterflies.3．Para.3  C．Brief introduction of the North American  monarch butterflies' migration.4．Para.4   D．The discovery about how the North  American monarch butterflies cover  such a long distance.5．Para.5   E．What is migration and why do animals migrate?[答案]　1－5　ECDABⅡ.根据课文内容选择正确答案1．Which is NOT the purpose of animals' migration?A．To find food.B．To find a partner.C．To escape being killed.D．To find warmer weather.2．What can we learn about the North American monarch butterflies from Paragraph 2?A．Every two years they will migrate to spend the winter.B．They have ugly black and orange wings.C．They manage to travel around 4，000 kilometres north and find their way to places where they will spend the winter.　D．Now people have found the solution about how they manage to travel such a long distance.3．Why does the author say the monarch is in serious trouble?A．The North American monarch butterflies are in danger of extinction.B．The North American monarch butterflies are forced to migrate every autumn.C．The North American monarch butterflies have to travel around 4，000 kilometres south.D．People are killing more and more North American monarch butterflies.4．What's the purpose of volunteers' work?A．To be aware of the importance of protecting the North American monarch butterflies.B．To keep a record of the migration of the North American monarch butterflies and find out enough plants for them to eat.C．To help the North American monarch butterflies increase their number.D．To get us to know more about the North American monarch butterflies.[答案]　1－4　CDABⅢ.概要写作微技能概要写作微技能(三)——概括句子的主旨要义A．阅读下列句子以及对其主旨要义概括的词语。1．Many animals move from one place to another at certain times of the year.This annual movement is called migration.→the definition of migration2．They migrate to find food，seek a partner，or in search of warmer weather.→the purpose of animals' migration3．Somehow they manage to travel around 4，000 kilometres south and find their way to California or Mexico.→a long journey4．Its population has crashed by as much as 90 per cent in the last few years.→the falling of the numberB．概括下列句子的主旨要义。1．They have found out that the monarch is able to tell the time of day.It uses its eyes to measure the position of the sun.The monarch's ability to tell the time and the sun's position.2．People have been working together to record its migration and make sure that there are enough plants for it to feed on.Concern for the monarch.