問題詳情

Passage 2On the old-time farm in America there were chickens and turkeys. There were also cows, pigs,and other livestock. But there very few machines. Most of the work was done by the entire farmfamily with the help of a “hired” man. Sometimes extra laborers were needed in busy seasons. Horsesprovided 79 percent of the power used, human labor 15 percent, and machines only 6 percent.Today all that has changed. On many modern farms machines now supply 96 percent of the power,human labor 3 percent, and horses 1percent.Modern farms are enterprising businesses which keeponly the livestock that can pay its way. The children go to school by bus every morning, the parentswork on the farm or in the house, and hired help is seldom needed. Their work has been replaced by awhole army of farm machines.Farmers in the machine age also use the new fertilizers, new sprays, new feeds, new hybrid seeds,and other helps developed by farm sciences. As a result the farmers are able to produce more foodwith less labor. This means fewer but larger farms and fewer but more prosperous farmers.
56.In olds, most of the work on a farm was done by______.
(A)all the farm family
(B)livestock
(C)farm machines
(D)both A and B

參考答案

答案：D
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)

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