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1、Our whole universe was in a hot dense state.Then nearly 14 billion years ago expansion(膨胀膨胀)startedUnit 4 How Life Began on the Earth Review The origin of life has many theories,some legendary(神话传说的神话传说的),some _,and some _.religiousscientificlegendaryDo you want to know the scientific theory of how
2、life began on the earth?Do you know the physical term -“The Big Bang Theory”?All started with“the big bang!”how Life Began on the earthReading Comprehension 之阅读理解题指导之阅读理解题指导Parts of this class(本堂课步骤本堂课步骤)以以Unit4 reading为载体，学习阅读为载体，学习阅读理解中理解中说明文的阅读方法说明文的阅读方法及及解题技巧解题技巧：1,Prediction读前预测读前预测2,Skimming略读
3、，获取大意略读，获取大意3,Locating and find answers 定位回定位回读完成阅读理解题读完成阅读理解题4,Make up relevant questions 自主读文章，小组出题自主读文章，小组出题Step1,Pre-reading:Predict the writing style,order,and contentWriting style decides the reading methods,such as说明文说明文/议论文议论文：Skim首末段首末段首末句首末句Opinion记叙文记叙文：看题目看题目再回读再回读发展发展与与情感情感How life bega
4、n on the earthRead the title and the first few sentences,and then try to guess:1,the writing style of this passage2,the writing order/sequence(写作顺写作顺序序)3,what might be talked about in the passage Writing style1.Exposition2.Narration3.ArgumentationWriting order(写作顺序写作顺序)1.firstlysecondlythirdlyfinall
5、y2.at the beginningthennext later after thatin the end/finally3.some people think-while others think-in my opinionTimelineMain ContentHow _began on _lifelifethe earththe earthStep 2:Skimming 略读重要部分，以了解文章的大意略读重要部分，以了解文章的大意 Read the passage very quickly to find out1.how many parts can the passage be d
6、ivided into?2.the main idea of the passage;How many parts can the passage be divided into?Two parts:The first part(Para.1-3):how the earth beganThe second part(Para.4-5):how life developed/evolved on the earthMain ideaThis passage mainly talks about_and_主旨题：主旨题：What is the main idea of this passage?
7、A.It is about the earth.B.How life began to appear on the earth.C.Water plays an important role in the development of life.D.How the earth began and how the life developed on the earth.D总结总结主旨题主旨题正确选项特征正确选项特征：概括的范围大小正好概括的范围大小正好解题技巧：解题技巧：反向推理反向推理What is the main purpose of the third paragraph?A.To te
8、ll us how water came into being B.To explain why water is important to lifeC.To explain why there is no life on the MarsD.To introduce waterBPracticeStep 3:回读与做题回读与做题（scan略读定位略读定位+study细读找细读找答案）答案）词义猜测题及指代题词义猜测题及指代题 What does“small clever animals”refer to in the last paragraph?A.Insects.B.Reptiles.C
9、.Dinosaurs.D.Humans.D The word“multiply”(Line 4,the 4th paragraph)means _.A.乘以乘以 B.繁殖繁殖 C.减少减少 D.分解分解 B总结总结词义猜测和指代题解题步骤：词义猜测和指代题解题步骤：一，一，定位定位：KEY WORDS定位定位回读回读二，二，替代替代：语境语境替代替代 What is the meaning of the word“presence”in this sentence“the continued presence of water allowed the earth to dissolve har
10、mful gases and acids into the oceans and seas”?A.gift B.appearance C.existence D.chairmanCPractice推测题推测题 The author implies(暗示暗示)that if we want the life to continue on the earth,we should_?A.cut down the population.B.solve the problem of global warming.C.think about a new way to grow more crops.D.n
11、ot waste water.B细节题细节题 How did the earth come into being according to the timeline?a.The earth became a solid globe/ball.b.The earth was a cloud of dust.c.Water appeared on the earth.d.The universe began with a“Big Bang”.e.The atmosphere formed.A.a-b-d-e-c B.d-c-a-e-b C.d-b-a-e-c D.d-b-e-a-cC总结总结推理题
12、、细节题解题步骤：推理题、细节题解题步骤：一，一，定位定位：KEY WORDS定位定位回读回读。二，二，对照对照（排除排除）Why was it necessary for plants to grow before animals?A Animals needed plants to protect them from the sun.B Plants provided oxygen for animals to breathe.C Animals could hide from hunters in forests.D It was easier for plants to growBPr
13、acticeCan you put the development of life into time order?a,insects and amphibiansb,reptiles c,shellfish and other fishd dinosaurs e,small plants in the waterf,plants on dry landg,mammals(including humans)A.d-b-g-e-f-c-a B.e-c-f-g-c-a-b C.e-c-f-a-b-f-g D.e-c-f-a-b-d-gDPractice 略读，概括略读，概括 定位，替换定位，替换
14、定位，对照定位，对照一：阅读理解题型一：阅读理解题型做题方法做题方法：1.Predict：读前预测读前预测文体，决定相应的阅读重点文体，决定相应的阅读重点2.Skim：快速阅读快速阅读并总结，获得文章大意或主旨并总结，获得文章大意或主旨3.回读：回读：根据题干中的根据题干中的Key Words回读回读文章，找答案文章，找答案二：阅读理解五种二：阅读理解五种题型题型 主旨题：主旨题：猜词义：猜词义：指代题：指代题：推断题：推断题：细节题：细节题：SummaryYour show time以大组为单位，根据文章内容，每组出一以大组为单位，根据文章内容，每组出一个阅读理解选择题：个阅读理解选择题：1
15、.主旨题主旨题 Whats the main idea of?2.猜测词义、指代题猜测词义、指代题What does the underlined word“”refer to?3.推断题推断题What can be inferred from?4.细节题细节题 Which of the following is(NOT)true?Assignment1,Finish the Ex.1,2,3 on Page27.2,Each row hand in a high quality questions based on the passage,the good ones will be on shownThank Thank YouYou