第6部分：完形填空(第51～65题，每题1分，共15分)
下面的短文有15处空白，请根据短文内容为每处空白确定1个最佳选项。
A Countrys Standard of Living
The standard of living of any country means the average persons share of the goods and services the country produces. A countrys standard of living， (51)， depends on its capacity to produce wealth. Wealth (52)this sense is not money， for we do riot live on money (53) on things that money can buy： goods such as food and clothing， and services such as transport and entertainment.
A countrys capacity to produce wealth depends upon many factors， most of (54) have an effect on one another. Wealth depends (55) a great extent upon a countrys natural resources. Some regions of the world are well supplied with coal and minerals， and have fertile (肥沃的) soil and a favorable climate; other regions possess none of them.
Next to natural resources (56) the ability to turn them to use. China is perhaps as well-off (57) the USA in natural resources， but suffered for many years from civil and external wars， and (58) this and other reasons was (59) to develop her resources. Sound and stable political conditions， and (60) from foreign invasions， enable a country to develop its natural resources peacefully and steadily， and to produce more wealth than another country equally well favoured by nature but less well ordered.
A countrys standard of living does not only depend upon the wealth that is produced and consumed (61) its own borders， but also upon what is directly produced through international trade(62)， Britains wealth in foodstuffs and other agricultural products would be much less if she had to depend only on (63) grown at home. Trade makes it possible for her surplus (过剩的) manufactured goods to be traded abroad for the agricultural products that would (64) be lacking. A countrys wealth is， therefore，much (65)by its manufacturing capacity provided (如果) that other countries can be found ready to accept its manufactures.
51 A however B furthermore C similarly D therefore
52 A by B on C in D with
53 A or B but C eitherD besides
54 A these B thatC whatD which
55 A at B to C by D with
56 A came B coming C comes D come
57 A toB like C by D as
58 A because B for C of D by
59 A uneasy B incapable C impossible D unable
60 A resolution B freedomC aggressionD destruction
61 A at B by C withinD on
62 A In short B For example C As a resultD On the other hand
63 A which B what C that D those
64 A otherwise B certainly C howeverD therefore
65 A made B done C produced D influenced