北师大英语必修三Unit9.Lesson3.导学案二

Unit 9 Lesson 3 Clean Machines导学案（第二课时）综合部刘娜Learning aims: To read the article and understand the main points.To compare and practice using the Present Perfect and Present PerfectContinuous tenses.Background: The Solar Super Car Challenge race is a 4,ooo km transcontinental race from Perth to Sydney. Other big races take place in the USA and Japan. Cars are usually designed and entered by university science and engineering departments.使用说明：1.借助导学案，充分预习课文。

2.认真书写，独立完成，规范做答，按时上交。

Ⅰ. 课堂导学1. worry ____ 担心2. ____ far 迄今为止3. take part in ____ 参加4. up ____ 达到（某个数量）5. take ____ 发生6. have a good impression ____ 对......有好的印象7. persuade ____ 使信服某事8. ____ the time 一直，始终9. complain ____ 抱怨10. get on/along ____ 与......相处Ⅱ.课堂演练1.be worried about 为某事担心，焦虑例.The whole family were worried about his safety.What are you worried about?2.so far到现在为止。

常与现在完成时连用。

例.They have so far failed to get in touch with the company.So far this month we have covered ten lessons in our grammar book.3.persuade …of 使信服某事。

例.She was not persuaded of the truth of his statement.He managed to persuade us of the workability of the plan; now we had to persuade the boss.persuade sb. to do sth.劝说某人做某事例.The salesman persuaded us to buy his product4. reach 达成，达到;延伸;伸手够例.The cost of the war reached billions of dollars.No agreement was reached between the two nations.The woods reach as far as the river.Can you reach the top shelf?5. appreciate1）感激，感谢，后接名词或动词-ing（短语）作宾语，如：I appreciate your help very much.I appreciate your driving me to the airport.2）欣赏，赏识，如：His new discovery wasn’t highly appreciated then.3)常用句型：I would appreciate it if you …..（从句的谓语动词多用一般过去时）“如果你……我将不胜感激”如：I would appreciate if you could come to my wedding.Ⅲ课堂检测1. More patients ____ in hospital this year than last year.A. treatedB. had been treatedC. has beenD. have been treated2. The first use of atomic weapons was in 1945, and their power ____increased enormously ever since.A. isB. wasC. has beenD. had been3. She has set a new record, that is, the sales of her latest book ___ 50 million.A. have reachedB. has reachedC. are reachingD. had reached4. How can you possibly miss the news? It ____ on TV all day long.A. has beenB. had beenC. wasD. will be5. - ____ David and Vicky ___ married?- For about three years.A. How long were; beingB. How long have; gotC. How long have; beenD. How long did; get6. – Hi, Tracy, you look tired.- I am tired. I ___ the living room all day.A. paintedB. had paintedC. have been paintingD. have paintedⅣ课后作业Pollution is reducing the fragrance of plants and thus preventing bees from pollinating(授粉) them—endangering one of the most essential cycles of nature, a new study suggests.The potentially hugely significant research, funded by US National Science Foundation, has found that gases mainly formed from the emissions of car exhaust prevent flowers from attracting bees and other insects to pollinate them. And the scientists who have conducted the study fear that insects’ abilities to drive away enemies and attract mates may also be disturbed.Professor Jose Fuentes, who led the study, said, “Scent molecules(分子) produced by flowers in a less polluted environment could travel for roughly 1,000 to 1,200 meters. But today they may travel only 200 to 300 meters. This makes it increasingly difficult for bees and other insects to locate the flowers.”The researchers, who worked on the molecules of snapdragons(金鱼草),found that the molecules are volatile(易挥发的) and quickly bond with pollutants, mainly formed from vehicle emissions. This chemically changes the molecules so that they no longer smell like flowers. A harmful cycle is therefore set up where insects struggle to get enough food and the plants do not get pollinated enough to multiply.Already bees, which pollinate most of the world’s crops, re in such a great decline that has never been known before in Britain and across much of the globe. At least a quarter of America’s 2.5 million honey bee colonies have been mysteriously wiped out by colony collapse disorder(CCD),where hives are found suddenly deserted.The crists has now spread to Europe. Politicians insist that CCD has not yet been found in Britain, but considering the present number of bees, the agriculture minister Lord Rooker has sent the warning, “The honeybee population could be wiped out in 10 years.”Although the researchers are not certain whether this is the real cause of CCD, they say that pollution is making life more difficult for bees and other insects in many ways.68. In what way does pollution prevent flowers from attracting bees?A. By shortening the distance traveled by the scent molecules of flowers.B. By disturbing the bees’ ability to attract mates.C. By weakening the bees’ ability to fight against enemies.D. By stopping flowers from giving off fragrance.69. What harm does the decreasing number of bees do to human beings?A. It will cause humans not to get enough honey.B. It will reduce the food supplies for the world.C. Humans will have to depend on other insects to pollinate plants.D. Humans will find it hard to deal with the deserted bee hives.70. From the passage we can know that .A. Europe is affected greatly by CCDD has destroyed most of the honey bee colonies in EuropeC. no honey bees will be found all over the world in the near futureD. European officials have paid much attention to CCD71. What would be the best title for the passage?A. Traffic Pollution Puts Bees in DangerB. Traffic Pollution is to Blame for CCDC. Pollution Makes Flowers Lose Their ScentD. Pollution Causes the Decrease in Flowers。