Unit 5 Using language ppt课件 (2)-(2022）新外研版高中《英语》选择性必修第一册.pptx

1、名师课堂外研版 高中英语网络教学资源新标准新标准英语英语高中选择性必修第一册高中选择性必修第一册Contenthomework exercisesobservingthe useage of past perfect learningbiodiversity3Click here to add the title text contentActivity 1 Look at the sentences from the reading passage and answer the questions.1.In sentence(a),which action happened first,“s

2、uspected”or“evolved from a common ancestor”?“evolved from a common ancestor.”2.In sentence(b),which action happened first,“refused to believe”or “evolved from lower forms of life”?“evolved from lower forms of life.”3.What does the structure had done indicate?It indicates the action happened before a

3、 certain past action.Using Language原文再现原文再现 Darwin suspected that the finches had evolved from a common ancestor,.In this sentence the two actions both hanppened in the past,Action B happened first,Action A happened later.In this situation,past perfect is used to describe Action B and simple past is

4、 used to describe Action A.Action Ahappening firsthappening laterAction BUning languageMany people refused to believe that living things,including humans,had evolved from lower forms of life.原文再现原文再现happening laterhappening firstThe past perfect is a verb tense which is used to show that an action t

5、ook place once or many times before another action/point in the past.Uning languageThe past perfect expresses the idea that something occurred before another action in the past.It can also show that something happened before a specific time in the past.past perfectsimple pastNow look for more senten

6、ces with the past perfect tense in the reading passage,and summarise its use in your own words.1.It was a young man who had left medical school without completing his degree.2.he had recently received a letter from his father predicting that he would be“a disgrace to yourself and all your family.3.A

7、fter Darwin had spent some time in South America,his room on the ship was crowed with samples of the plants and animals he hadcollected.4.At that time,people believed that all species had appeared on Earth at the same time,and had not changed since.5.It seemed their beaks had evolved according to wh

8、at food was available on that particular island.6.Over time,it had slowly evolved into many new species.8Click here to add the title text contentActivity 2 Complete the paragraphs with the information from the given sentences.1 a Natural disasters led to food shortages in the 1960s.b Yuan Longping b

9、egan to do research on hybrid rice.c Yuan Longping developed a better type of rice.Yuan Longping 1_ to do research on hybrid rice because natural disasters 2_ food shortages in the 1960s.In the end,he 3_ a better type of rice.2 a Gregor Mendel chose to study pea plants because their characteristics

10、were easy to control.b Gregor Mendel made important discoveries about genetics.c Gregor Mendel died in 1884.Gregor Mendel 4_ study pea plants because their characteristics were easy to control.By the time of his death in 1884,he 5_ important discoveries about genetics.had madebegan had led todevelop

11、edchose to9Click here to add the title text contentActivity 3 Complete the online encyclopaedia entry with the correct form of the words in the pete decline eatlive introduce arrive Lonesome George was the last Pinta Island tortoise.He died in 2012.After Georges death,the Pinta Island tortoise was d

12、eclared extinct.The extinction of the Pinta Island tortoise blamed on humans.Before humans 1_ on the island,the species 2_ in isolation and 3_ the plants that naturally grew there.George was discovered many years after their arrival,and by then humans 4_ new species that 5_ for the food the tortoise

13、s ate.After goats in particular had been brought to the island,the Pinta Island tortoise population 6_.Eventually,only George remained.had livedeatenhad introduced competed declinedarrivedBiodiversity11Click here to add the title text contentActivity 5 Listen to the podcast and choose the statements

14、 that are made.1 Biodiversity is important.2 Bacteria are always harmful to humans.3 Some species of bacteria are used in food production.4 Many species of bacteria recycle dead organic matter.5 Our immune systems are able to fight off all germs.12Click here to add the title text contentActivity 6 L

15、isten again and complete the fact sheet.thirty trillionthirty-nine trillionmade up of cellsbricks that are used to build houseshelp with digestionbreak down13Click here to add the title text contentActivity 7 Complete the boxes with the expressions from the podcast.Checking background knowledgeAddin

16、g information14Click here to add the title text contentWhat species are mentioned and what is special about them?Two species are mentioned:the blue whale and the water bear.The blue whale is the largest animal species on Earth,which cangrow up to almost 30 metres in length and weigh over 130,000 kil

17、os.The water bear is probably the toughest species,which can survive temperatures from 150C to a below freezing-272C.Activity 8 Read the passage and answer the questions15Click here to add the title text contentThe Galapagos Islands are renowned worldwide for their unique biodiversity.The Giant Tort

18、oise Reserve on Santa Cruz 1_ several species of giant tortoise that 2_ the Galapagos Islands.The island is also home to the Charles Darwin Research Station,where 3_ studies are carried out.Activity 9 Complete the paragraphs with the correct form of the words and expressions in the box.ancestor scie

19、ntific be native to primitive habitat appearance be home to ecosystemis home toare native toscientificMangroves are one of the coastal plants that grow on Isabela.They serve as the 4_ for various birds and fish,and are very important to the 5_.habitatsecosystemLguanas can be found on San Cristobal.T

20、hey have a very special 6_,with comb-like spines on their back.appearanceprimitiveancestorThere is evidence that all the different iguanas have developed from more 7_ ones and share a common 8_.18Click here to add the title text contentActivity 10 Look at the pictures of the species native to different regions of China.Talk about biodiversity in China using the words and expressions in this section.19Click here to add the title text contentHomeworkThankyouforwatching