Unit 4  Global warming

_______________________________________________________________________________答案： some good learning methods should be adopted to improve your study, the most effective one of which is to discuss with your classmates. 3. 【原句】they also agree that it is the burning of more and more fossil fuels that has resulted in this increase in carbon dioxide.他們還贊同正是由于越來越多燃燒化石燃料導致了二氧化碳的增加。 [模仿要點] 句子結構：賓語從句中的強調句【模仿1】文章表明是人類的活動對村莊造成的環境破壞。_______________________________________________________________________________答案： the passage indicates that it is human’s activities that has resulted in the environmental destruction to the village.【模仿2】我們都同意的是年輕一代應該負起振興國家的責任。_______________________________________________________________________________答案：we all agree that it is the younger generation that should take up the responsibility to build up the country.    三、單元自測      1完形填空 閱讀下面短文，掌握其大意，然后從21—30各題所給的a、b、c和d項中，選出最佳選項，并在答題卡上將該項涂黑。詞數：161完成時間：15分鐘難度：*wouldn't it be great if we didn't have to remember passwords (密碼) ever again? if we could just sit in front of our computers and be   21   logged in (登錄)? crave mentions how nec soft biode logon system uses face recognition technology to log you on to windows, rather than using a   22  .  all you need is a webcam and your pretty face to   23   your pc. no more  24   , confusing passwords to remember or change every few months.     after doing a little research, i found this type of   25   already available to consumers via a relatively   26   application called face code. the   27   requires the use of a webcam to recognize and log pc users into their systems. you can add as many   28   as you want, provided they each have a windows account. if the system   29   to recognize your   30   , you can recall the windows user name and password by using a hot-key combination. 21. a. automatically                b. personally                  c. correctly           d. occasionally 22. a. face                      b. password           c. software         d. system 23. a. access              b. connect                 c. recognize          d. remember 24. a. simple                   b. complicated      c. special             d. useful 25. a. computer                b. technology       c. password          d. application 26. a. independent      b. infrequent              c. inexpensive        d. instant 27. a. account                  b. consumer                c. designer                 d. software 28. a. users             b. passwords        c. systems            d. computers 29. a. begins              b. tries                    c. fails                     d. stops 30. a. account                  b. name              c. password                d. face [答案解析]