Unit5 A delicate world Section A导学案-（2019）新外研版高中英语选择性必修第二册（无答案）.doc

1、Unit 5 A delicate world班级： 小组： 姓名： 小组评价： 教师评价：【预习指导】1.Look up the new words in the dictionary2.Log on to the Internet to know about the background of this unit.【学习目标】1.Words , phrases and structures of this unit.2.Have a good command of the main idea of the text.3.Grammar: It as an empty subject【使用说

2、明】1.First refer to the exercise book and master the important points of this unit.2.Do more exercises to strengthen the understanding of the grammar.【重点难点】1.How to tell the difference between it as an empty subject and empty object. 2.Finish a passage using it.【预习自测】Section AStarting out & Understan

3、ding ideas基础夯实.单句填空1.(erode) from winds has removed a large part of the land.2.One method of soil (conserve) is the use of windbreaks.3.(substantial) evidence exists to support the theory.4.No one should break the (ecology) balance.5.The roof (collapse)under the weight of snow.短语填空participate in,or

4、so,in consequence,once again,be native to,out of control,die out,take over1.,Jerry decided to drop out of school and started his own business.2.At that point I didnt feel anything;adrenaline (肾上腺素).3.Panda China and is a national treasure.4.Can overseas students all kinds of activities in your schoo

5、l?5.It makes sense to work on the problem before it gets.6.As a result,these endangered animals even.7.Taylor had just moved to the town a month before.8.Today Chinese calligraphy is a subject in schools.完成句子1.我很吃惊他会想出如此好的主意。I was amazed that he such a sweet idea.2.当去掉脂肪和盐,食物就少了些味道。When fat and salt

6、 food,the food tastes as if it is missing something.3.今年,选择这一学科的学生人数减少了30%。This year,the students who choose this subject .4.尽管我们都很担心,结果一切都顺利。Despite our worries everything well.5.他明确表示他对这门学科不感兴趣。He he was not interested in the subject.素养提升.阅读理解A主题语境:人与自然Plants are boring.They just sit there photosy

7、nthesizing(光合作用) while animals have all the fun.Right?Not so much.A new study has found that there is a long history of interactions between ants and plants.The ant and plant co-evolution (协同进化) started with ants feeding on plants and plants evolving ant-friendly features.Plants make a number of dif

8、ferent structures that are specific for ant use.Some plants have evolved features that persuade ants into defending them from attack from other insects and even mammals.These include hollow thorns that ants will live inside,or extra nectar(琼浆) on leaves or stems for the ants to eat.Some ants will ju

9、st cheat and take the nectar and run,but some will stick around and attack anything that tries to hurt the plant.Other plants get ants to help them move their seeds around,by providing them with rich food packets attached to the seeds.The ant will pick up the seed and carry it away,eat the food pack

10、et,and leave the seedoften in a nutrient-rich area where itll grow better,and since its farther away from its parent,they wont have to compete for resources.But scientists werent sure how the evolutionary relationship between ants and plants got started.If evolution is an arms race between species d

11、eveloping ways to make use of their neighbours,then scientists wanted to know whether plants or ants fired the first shot.It was a chicken-and-egg question,whether things started with ants developing behaviours to take advantage of plants,or plants evolving structures to take advantage of ants.The h

12、istory of ants and plants evolving together goes back to the time of the dinosaurs,and its not easy to tell from fossils who fired the first shot.However,it is a question of little significance.Scientists say their study matters because it provides a look at how these widespread and complex interact

13、ions evolved.【语篇解读】这是一篇说明文。文章主要讲了一项新的研究发现,蚂蚁和植物之间的互动有着悠久的历史。蚂蚁和植物的共同进化始于蚂蚁以植物为食,植物进化出对蚂蚁友好的特征。1.Some plants attach food packets to their seeds in order to.A.reward the antsB.make a fool of antsC.provide nutrition for the seedsD.get the seeds moved around2.What does paragraph 2 mainly tell us?A.How p

14、lants and ants interact.B.What ants do to protect plants.C.How plants and ants survive attacks.D.Why plants and ants need co-evolution.3.Which is true about the evolutionary relationship between ants and plants?A.Ants depended more upon plants.B.It caused a race for better evolution.C.How it got sta

15、rted was uncertain.D.It was of little value for future studies.4.Whats the authors purpose of writing the passage?A.To introduce a science research method.B.To inform readers of a latest research finding.C.To arouse readers interest in science research.D.To criticize peoples traditional views about

16、plants.B主题语境:人与自然Give yourself a test.Which way is the wind blowing?How many kinds of wildflowers can be seen from your front door?If your awareness is as sharp as it could be,youll have no trouble answering these questions.Most of us observed much more as children than we do as adults.A childs day

17、is filled with fascination,newness and wonder.Curiosity gave us all a natural awareness.But distinctions that were sharp to us as children become unclear;we are numb(麻木的) to new stimulation(刺激),new ideas.Relearning the art of seeing the world around us is quite simple,although it takes practice and

18、requires breaking some bad habits.The first step in awakening senses is to stop predicting what we are going to see and feel before it occurs.This blocks awareness.One chilly night when I was hiking in the Rocky Mountains with some students,I mentioned that we were going to cross a mountain stream.T

19、he students began complaining about how cold it would be.We reached the stream,and they unwillingly walked ahead.They were almost knee-deep when they realised it was a hot spring.Later they all admitted theyd felt cold water at first.Another block to awareness is the obsession(痴迷) many of us have wi

20、th naming things.I saw bird watchers who spotted a bird,immediately looked it up in field guides,and said,a “ruby-crowned kinglet” and checked it off.They no longer paid attention to the bird and never learned what it was doing.The pressures of “time” and “destination”(目的地)are further blocks to awar

21、eness.I encountered many hikers who were headed to a distant camp-ground with just enough time to get there before dark.It seldom occurred to them to wander a bit,to take a moment to see whats around them.I asked them what theyd seen.“Oh,a few birds,” they said.They seemed bent on their destinations

22、.Nature seems to unfold to people who watch and wait.Next time you take a walk,no matter where it is,take in all the sights,sounds and sensations(感觉).Wander in this frame of mind and you will open a new dimension to your life.【语篇解读】这是一篇夹叙夹议文。作者希望我们能够运用我们的感官和情感去全方位感受自然的美妙,去感受世界的美好。5.What idea does th

23、e author convey in paragraph 3?A.To avoid jumping to conclusions.B.To stop complaining all the time.C.To follow the teachers advice.D.To admit mistakes honestly.6.The bird watchers behaviour shows that they .A.are very patient in their observationB.are really fascinated by natureC.care only about th

24、e names of birdsD.question the accuracy of the field guides7.Why do the hikers take no notice of the surroundings during the journey?A.The natural beauty isnt attractive to them.B.They focus on arriving at the camp in time.C.The forest in the dark is dangerous for them.D.They are keen to see rare birds at the destination.8.In the passage,the author intends to tell us we should .A.use our senses to feel the wonders of the worldB.get rid of some bad habits in our daily lifeC.open our mind to new things and ideasD.try our best to protect nature