This country, as Lincoln said, belongs to the people. So do the natural resources which make it rich. They supply the basis of our prosperity now and hereafter. In preserving them, which is a national duty, we must not forget that monopoly is based on the control of natural resources and natural advantages, and that it will help the people little to conserve our natural wealth unless the benefits which it can yield are given back to the people. Let us remember, also, that conservation does not stop with the natural resources. The principle of making the best use of all we have requires that we stop the waste of human life in industry and prevent the waste of human welfare which flows from the unfair use of concentrated power and wealth in the hands of men whose eagerness for profit blinds them to the cost of what they do. We have no higher duty than to promote the efficiency of the individual. There is no surer road to the efficiency of the nation.
单选题
What plays an essential role in making the nation prosperous according to this passage?
【正确答案】
C
【答案解析】解析：首段第三句They supply the basis of our prosperity now and hereafter．是答题依据，其中They指的是上句的the natural resources。
单选题
The passage suggests that the benefit from natural resources is mainly enjoyed by ______.
【正确答案】
B
【答案解析】解析：本题依据是第四句，关键部分是monopoly is based on the control of natural resources and natural advantages，…unless the benefits...are given back to the people。
单选题
The conservation mentioned in the passage includes the following EXCEPT ______.
【正确答案】
D
【答案解析】解析：本题宜采用排除法，第二段前两句提到了有关A，B，C的内容，唯有D全文都没有提到。
单选题
What may contribute to the unfair use of concentrated power and wealth by some people?
【正确答案】
A
【答案解析】解析：本题依据是第二段的第二句，关键部分是the unfair use of concentrated power and wealth in the hands of men whose eagerness for profit blinds them to the cost of what they do，意思是"权力不公正地集中在某些人的手里，出于对利润的渴望，他们对所付出的一切代价视而不见"。
单选题
On what does the efficiency of a nation depend?