根据短文回答 51～65 题。
A Country's Standard of Living
The"standard of living" of any country means the average person' share of the goods and service.s the country produces.A country's smartcard of living,_________ (51) depends on its capacity to produce wealth "wealth" _________ (52) this sense is not money, for we do not live on money_________ (53) on things that money can buy"goods" such as food and clothing,and "services" such as transport and entertainment it.
A country's 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 country's natural resources.Some regions of the world are well supplied with coal and minerals,and have fertile(肥沃的)soil and a favorable crimple 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 reabsorbs was_________ (59)to develop her resources.Sound and stable political conditions。and_________ (60)from foreign invasions,enable a country to develop is natural resources peacefully and steadily, and to produce more wealth than another country equally well favored by nature but less well ordered.
A country's 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),Britain's 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 country' S wealth is,therefore,much_________ (65)by its manufacturing capacity provided(如果)that other countries can be found ready to accept its manufactures.
第 51 题

A. however
B. furthermore
C. similarly
D. therefore