Changes in the way people live bring about changes in the jobs that they do. More and more people live in towns and cities inst

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问题    Changes in the way people live bring about
changes in the jobs that they do.  More and more
people live in towns and cities instead on farms and【M1】______
in villages. Cities and states have to provide services
city people want, such like more police protection,【M2】______
more hoapitals, and more schools. This means that
more policemen, more nurses and technicians, and
more teachers must be hired. Advances in technology
has also changed people’s lives. Dishwashers and【M3】______
washing machines do jobs that were once done by the【M4】______
hand. The widespread use of such electrical appliances
,leans that there is a need for servicemen to
keep it running properly.           【M5】______
   People are earning higher wages and salaries.
This leads changes in the way of life. As income【M6】______
goes down, people may not want more food to eat or【M7】______
more clothes to wear. But they may want more mad
better care from doctors,  dentists and hospitals.
They are likely to travel more and to want more
education. Nevertheless, many more jobs are avail 【M8】______
able in these services.
   The government also affects the kind of works 【M9】______
people do. The governments of most countries spend
huge sums of money for international defense. They【M10】______
hire thousands of engineers, scientists, clerks, typists
and secretaries to work on the many different
aspects of defense.
【M3】

选项

答案将has改成have。

解析 因为该句主语是复数名词advances,例如:The final performance,which may take a minute,has been preceded by many hours of rehearsal.最终的演出,也许只有一分钟,在这之前要有许多小时的排练。
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