请教：2016英语专八考试改错练习题四十二第8题如何解答？

spades and other complicated tools. In his house cooking was done __7__in wood-burning stoves

his own muscles like his chief source of power. He used axes, __6__spades and other complicated tools.

farmer aroused at dawn or before and had much work to do, with __5__his own muscles like his chief source of power. 

were not much changed from that they had been in old days. The __4__farmer aroused at dawn or before and had much work to do

the city, yet eighty percent of the American population was still in the country. In the late nineteen century, farm work and life __3__were not much changed from that they had been in old days

In 1860, because some of the farm population had moved to __2__the city

??Traditionally, the American farmer has always been independent and hard-working. In the eighteenth century farmers were quite self-sufficient. The farm family grew and made almost nothing it needed. The surplus crop would be sold to buy a new __1__items in the local general store.??

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 in villages. Cities and states have to provide __1__services city people want, such like more police protection, more __2__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 people's lives. __3__Dishwashers and washing machines do jobs that were once done by the hand. The widespread use of such electrical appliances __4__means that there is a need for servicemen to keep it running properly. __5__People are earning higher wages and salaries. This leads __6__changes in the way of life. As income goes down, people may not __7__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. __8__The government also affects the kind of works people do. __9__.The governments of most countries spend huge sums of money for international defense. They hire thousands of engineers, __10__scientists, clerks, typists and secretaries to work on the many different aspects of defense.

The governments of most countries spend huge sums of money for international defense. They hire thousands of engineers, __10__scientists, clerks, typists and secretaries to work on the many different aspects of defense.

The government also affects the kind of works people do. __9__.