Unit 5  The power of nature

答案：i went back to my hometown where i spent my happy childhood. 【模仿2】放學(xué)后，所有的學(xué)生去了有很多體育器材運(yùn)動場以放松自己。_______________________________________________________________________________答案：after school, all the students went to the playground where there is much sports equipment to relax themselves.  4. 【原句】the other two climbed down into the crater to collect some lava for later study, but this being my first experience，i stayed at the top and watched them.另外兩人攀下火山口去收集供日后研究用的巖漿，我是第一次經(jīng)歷這樣的事，所以留在山頂上觀察他們。  [模仿要點] 句子結(jié)構(gòu)： this being my first experience 作獨(dú)立主格【模仿1】兩名學(xué)生在我面前表現(xiàn)完美，但是由于這是我第一次站在全班同學(xué)面前，我顫抖不安。_______________________________________________________________________________答案： two students before me performed perfectly, but this being my first time to stand before the whole class, i was trembling and shaking. 【模仿2】其他學(xué)生都緊張，但由于這是我第二次，我很輕松，自信。_______________________________________________________________________________答案： other students were all nervous , but this being my second time, i was quite relaxed and confident.     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(shù)：195完成時間：14分鐘難度：   how americans treat pets has changed greatly over the past decade or so. no longer do we regard dogs and cats as animals in the backyard that eat our left-over food. today, 63 percent of cat owners and 42 percent of dog owners   21   their beds with their pets.    pets are the   22   of a huge commercial industry that tries to   23   not only the basic needs of animals but also the needs of pet owners.    sixty-three percent of american homes have a pet. not   24  . cats and dogs are the most   25   pet choices.    bob vetere, president of the american pet product manufacturers association, said the   26   in spending started in the mid- ’90s and has continued. "certainly post 9/11, the world is a   27   place for some people. people are looking for   28   , and that's something that a pet provides," vetere said.    another   29   is the baby boomer demographic (生育高峰的人口). vetere points out that "a lot of baby boomers have sent their kids off to college; we were once doting (溺愛的)   30  , and now we're becoming doting pet owners'. 21. a. enjoy              b. share                   c. present                d. arrange 22. a. choice            b. product                       c. hope                  d. focus 23. a. meet              b. balance                        c. make                  d. change 24. a. interestingly         b. embarrassingly    c. surprisingly         d. undoubtedly 25. a. popular             b. natural                  c. appropriate            d. various 26. a. balance            b. increase                      c. level                  d. quality 27. a. noisier             b. safer                          c. quieter               d. scarier 28. a. turning            b. escape                        c. comfort               d. hope 29. a. result              b. problem                 c. reason                d. effect 30. a. friends             b. workers                       c. children               d. parents 答案：