六级考试暑期备考的改错练习(4)

　　instead on farms and in villages. Cities and states have to provide --71. 　　services city people want, such like more police protection, more --72. 　　hospitals, and more schools. This means that more policemen, 　　more nurses and technicians, and more teachers must be hired. 　　Advances in technology has also changed peoples lives. --73. 　　Dishwashers and washing machines do jobs that were once done 　　by the hand. The widespread use of such electrical appliances --74. 　　means that there is a need for servicemen to keep it running --75. 　　properly. 　　People are earning higher wages and salaries. This leads --76. 　　changes in the way of life. As income goes down, people may not --77. 　　want more food to eat or more clothes to wear. But they may 　　want more and better care from doctors, dentists and hospitals. 　　They are likely to travel more and to want more education 　　Nevertheless, many more jobs are available in these services. --78. 　　The government also affects the kind of works people do. --79. 　　The governments of most countries spend huge sums of money 　　for international defense. They hire thousands of engineers, --80. 　　scientists, clerks, typists and secretaries to work on the many 　　different aspects of defense. 　　答案：71. on --- of 　　72. like --- as 　　73. has --- have 　　74. the --- / 　　75. it --- them 　　76. leads --- causes 　　77. down --- up 　　78. Nevertheless --- Therefore 　　79. works --- work/job/jobs 　　80. international --- national