In some parts of the United States, farming is easy. But farming has always been difficult in the northeastern corner of the country, which is called New Engla nd. New England has many trees and thin, rocky soil. Anyone who has wanted to start a new farm there has had to work very hard. The first job has been cutting down trees. The next job has been digging stumps (树桩) of the trees out of the soil. Then the farmer has had the difficult job of removing stones from his land. The work of removing stones never really ends, because every winter more stones appear. They come up through the thin soil from the rocks below. Farmers have to keep removing stones from the fields. Even today, farms which have been worked on for 200 years keep producing more stones. That is why stone walls are used instead of fences around New England fields. The stone walls are not high: A man can easily climb over them. But they keep the farmer’s cows from joining his neighbour’s cows. .   New England is an area ______. in the northeastern part of Britain which has been newly discovered by the Englishmen which lies between Australia and New Zealand which lies in the northeastern part of the USA 65.   According to the passage, farming is difficult in New England because ______. A．the winter is very long there B．the farms are very old C．the soil is rocky and thin D．there are not enough machines for farming 66.   From this passage, we know the removing of stones ______. must be done again and again is usually done during the winter is an interesting job children enjoy doing was more difficult before machines were used 67.   In New England, stone walls are used to ______. keep erous beasts out keep the farmer’s cows from wandering away protect the farmers fields from thieves provide comfortable living conditions for the farmer’s family