1、B4U5Using languagePast perfectBiodiversityActivity 1 Look at the sentences from the reading passage andanswer the questions.1.In sentence(a),which action happened first,“suspected”or“evolved from a common ancestor”?“evolved from a common ancestor”.2.In sentence(b),which action happened first,“refuse
2、d 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 certain past action.Activity 1 Now look for more sentences with the past perfect tense in the reading passage,and summarise its u
3、se 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.After Darwin had spent some time in South America,his room on the ship was
4、 crowed with samples of the plants and animals he had collected.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 what food was available on that particular island.6.Over time,it had slowl
5、y evolved into many new species.Past perfectform:function:过去完成时与现在完成时的区别：had done过去某一时刻或某一动作之前已完成的动作或状态，也可以过去某一时刻或某一动作之前已完成的动作或状态，也可以说是说是“过去的过去过去的过去”。nowpastfuture过去完成时过去完成时现在完成时现在完成时时间参照不同时间参照不同ExercisesComplete the sentences with the correct form of the verbs and phrasal verbs in brackets.1.Jane _
6、(watch)a nature film on TV when someone knocked on the door.2.On our trip to Africa last year,we _(see)lions sitting in the tall grass watching us.3.The girl,when _(question)why she _(cheat)in the exam,just lowered her head and kept silent.4.The boy _(cry)loudly because he _(lose)his way in the jung
7、le and thought he couldnt go back home.5.The young man insisted he _(do)nothing wrong and that the police _(release)him6.By the end of last year,another new hospital _(complete)in our city.7.I got an email from my old friend last Sunday.Until then，we _(keep)in touch for nearly 3 years.was watchingsa
8、wquestionedhad cheatedcriedhad losthad donereleasehad completedhad keptActivity 2 1.began2.had led to3.developed4.chose to5.had madeComplete the paragraphs with the information from the given sentences.Activity 3 Complete the online encyclopedia entry with the correct form of the words in the pete d
9、ecline eatlive introduce arrivehad livedeatenhad introduced competed declinedarrivedActivity 4 Work in pairs.uAct out a role-play using the information in Activity 3.uOne of you will play the keeper of Lonesome George,and the other will play the reporter asking about George.uUse the past perfect ten
10、se where appropriate.BiodiversityActivity 5 Listen to the podcast and choose the statements 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 sys
11、tems are able to fight off all germs.Activity 6 Listen again and complete the fact sheet.Discuss what you know about cells and bacteria in pairs.thirty trillionthirty-nine trillionmade up of cellsbricks that are used to build houseshelp with digestionbreak downActivity 7Do you know about.?Have you h
12、eard of.?Complete the boxes with the expressions from the podcast.By the way.Actually.In fact,.Speaking of which,Checking background knowledgeAdding informationAnswer the questions.Activity 81.What species are mentioned and what is special about them?The blue whale and the water bear.The blue whale
13、is the largest animal species on Earth,which can grow up to almost 30 metres in length and weigh over 130,000 kilos.The water bear is probably the toughest species,which can survive temperatures from 150C to a below freezing-272C.2.What other unusual life forms do you know of?Activity 9 1.is home to
14、2.are native to3.scientific4.habitats5.ecosystem6.appearance7.primitive8.ancestorComplete the paragraphs with the correct form of the words and expressions in the box.Activity 10 Work in pairs.uLook at the pictures of the species native to different regions of China.uTalk about biodiversity in China
15、 using the words and expressions in this section.uDo online research to find more information.水杉水杉胡杨胡杨Smart expressions 宣布灭绝 这种乌龟的灭绝归咎于人类。到那时为止 尤其，特别 对有害 抵抗病菌 因为而举世闻名 是的家园/栖息地 原产于declare extinctThe extinction of the tortoise is blamed on humans.by thenin particularbe harmful to fight off germs be re
16、nowned worldwide for be home to be native to declareVN to say sth officially or publiclyusages:1.VN e.g.宣战2.V that e.g.他声明不再竞选连任总统。3.VN-N e.g.宣布挑战成功4.VN-ADJ e.g.习主席宣布冬奥会开幕。5.VN to inf e.g.这幅画被判定是赝品(forgery)。declare war on the countryHe declared that he would not run for a second term as president.de
17、clare the challenge a successPresident Xi declared the Beijing 2022 Winter Olympics open.The painting was declared to be a forgery.declaration Ndeclarative ADJHow to translate declare in the sentences?1.Do you have to declare everything you buy at the airport?2.“Ill do it!”Tom declared.declare(果断地说；to state sth.firmly and clearly)申报（应纳税物品）
