unit21单元同步练习

unit21单元同步练习内容摘要：

A. which B. while C. when D. where 29. A. bus B. taxi C. traffic D. people 30. A. as to B. as C. in order that D. that 31. A. early B. earlier C. late D. later 32. A. along B. out C. up D. down 33. A. where B. how C. because D. if 34. A. early B. late C. ago D. before 35. A. look B. work C. wait D. care 36. A. and B. so C. but D. or 37. A. in B. out C. through D. over 38. A. talking B. telling C. speaking D. saying 39. A. with B. through C. over D. in 40. A. entered B. left C. opened D. closed 41. A. it B. that C. why D. what 42. A. if B. because C. though D. so 43. A. by B. in C. on D. with 44. A. take B. catch C. sit D. see 45. A. station B. train C. office D. county （共 10小题，计分 30分） 阅读下面短文，并做每篇后面的题目。 从四个选项中 ，选出能回答所提问题或完成所给句子的最佳答案。 a Motor cars were first made in England just before 1900. The parts for the bodies and engines were hand made and the cars were built from these. One at a time. This took a long time, and the cars cost a lot of money. Then a quicker and cheaper way of making cars was found. Instead of making all the parts at their own works. Some car factories asked other factories to make some of them. All the parts were then fitted together in the car factories. Modern carmaking factories are so large that each one is really a lot of factories close together. Each workshop makes some parts. The pieces of a car body are joined together by welders(电焊工 ) . All the bits and pieces that make up each car are collected and put ready for the assembly line(装配线 ) , where they are fitted together. 46. The first motor cars were probably made by______. A. Europeans B. the Whites C. the Blacks D. the English 47. Over 100 year ago, people had to spend a long time on motor cars as______. A. new ways of making。