请教：2016英语专八考试改错练习题四十二第5题如何解答？

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

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

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

People are earning higher wages and salaries. This leads __6__changes in the way of life.

Machines have a certain novelty value, as toys for adults. It is certainly less __2__

means that there is a need for servicemen to keep it running properly. __5__People are earning higher wages and salaries.

before the dawn of writing history.

__7__language and logic, or language and culture。

means that there is a need for servicemen to keep it running properly. __5__People are earning higher wages and salaries.

and for the federal government beginning at __7__1971