请教：2016英语专八考试改错练习题四十三第7题如何解答？

Here is how one teacher puts:" I usually have the __4__

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

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

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.

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

‍‍before the dawn of writing history.‍‍

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

Probably developing in northeastern __4__Turkey