- 1、本文档共31页,可阅读全部内容。
- 2、有哪些信誉好的足球投注网站(book118)网站文档一经付费(服务费),不意味着购买了该文档的版权,仅供个人/单位学习、研究之用,不得用于商业用途,未经授权,严禁复制、发行、汇编、翻译或者网络传播等,侵权必究。
- 3、本站所有内容均由合作方或网友上传,本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺!文档内容仅供研究参考,付费前请自行鉴别。如您付费,意味着您自己接受本站规则且自行承担风险,本站不退款、不进行额外附加服务;查看《如何避免下载的几个坑》。如果您已付费下载过本站文档,您可以点击 这里二次下载。
- 4、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等,请点击“版权申诉”(推荐),也可以打举报电话:400-050-0827(电话支持时间:9:00-18:30)。
查看更多
人教课标版
高二选修6
Unit 4;Discovering useful words and expressions (P28);1. Charles Keeling collected ______on the carbon dioxide content in the atmosphere over a forty-year period. He found that the amount of carbon dioxide _______ increasing during that time.;2. Although we are burning coal in huge _________ every year, we wont ________ of it for centuries.
3. If the amount of greenhouse gases continues to _______, we could be facing a global __________ .;4. Many scientists believe that global warming has __________ through the burning of fossil fuels. ;6. On the whole the warming of the earth is a ____________ that causes great concern.
7. The __________ shows temperature changes during the 20th century.
8. One hectare of forest can absorb 23 tons of carbon dioxide ____ year.;9. The washing machine uses too much energy, but _________ we buy a more economical one, it would still use too much water.
10. The car accident on the main road yesterday ___________ one driver’s death.;I. 代词 it
a. 用作人称代词, 代替前文提到的事物。
My watch is missing. I can’t find (it) anywhere.
Her father has gone abroad. Have you heard about (it)? ;b. 代替指示代词this, that。
What’s this? (It’s) a computer.
Whose pen is that? It’s mine.
c. 表示时间、天气、距离、季节等。
It’s time for lunch.
It’s getting warmer and warmer.;II. 引导词:
a. 作形式主语, 代替由不定式, 动名词或从句表示的真正主语。其基本句型为:
It (形式主语) +adj. + to+ v.
It (形式主语) +adj. + that (subject (主语)+v. ) ; It is +pp.+ that…=sb./sth. is to do ;① It is very important to help each other.
② It is no use / useless going there again.
③ It’s not decided yet when they will leave for Shanghai.
④ It seems that he has caught a cold. =He seems to have caught a cold.;b. 作形式宾语, 6123 结构
主语+谓语+it (形式宾语)+宾语补足语+to do sth. (doing sth. 或that从句).;① Marx found it important to study the situation in Russia.
② She thought it no use to write to him again.
③ They want to make it clear to the public that they do an important
您可能关注的文档
- Unit4CyberspacePeriodFive CommunicationWorkshop课件(北师大必修2).ppt
- Unit4CyberspacePeriodFourLesson4VirtualTourism课件(北师大版必修2,广东专用).ppt
- Unit4CyberspacePeriodFourLesson4VirtualTourism课时精练(北师大版必修2).doc
- Unit4CyberspacePeriodFourLesson4VirtualTourism课时精练(北师大版必修2,广东专用).doc
- Unit4CyberspacePeriodFour课时训练(北师大版必修2).doc
- Unit4CyberspacePeriodOneWarm-upandLesson1Tomorrow'sWorld课时精练(北师大版必修2).doc
- Unit4CyberspacePeriodOneWarm-upandLesson1Tomorrow'sWorld课时精练(北师大版必修2,广东专用).doc
- Unit4CyberspacePeriodOneWarmshyupandLesson1课件(北师大版必修2,广东专用).ppt
- Unit4CyberspacePeriodOne课时训练1(北师大版必修2).doc
- Unit4CyberspacePeriodSix课时训练1(北师大版必修2).doc
文档评论(0)