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 Country's Standard of Living
The"standard of living"of any country means the average person's share of the goods and serv'ices the country produces．A country's standard of living，therefore_________(51)first on its capacitv to produce weahh．"Wealth"in this__________(52)is not money，for we do not live on moneybut on things that money can buy："goods"such as food and clothing，and"services"such astransport and entertainment．
A country's capacity to__________(53)wealth depends upon many factors，most of________(54)have an effect on one another． Wealth depends__________(55)a great extent upon a country'snatural 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___________(56)none of them． Next to natural resources comes the ability to__________(57)them to use．China is perhaps asrich as the USA in natural resources，but suffered for many years__________(58)civil and externalwars．and for this and other_____________(59)was unable to develop her resources．Sound and stable political conditions，and_____________(60)from foreign invasions，enable a country to develop its resources peacefully and steadily，and to produce more__________(61)than another country equally well favored by nature but less well ordered．
A countrv's standard of living does not only depend upon the wealth that is produced and (62)within its own borders，but also upon what is directly produced through internationaltrade for mple，Britain's wealth in foodstuffs and other agricultural__________(63)would be much 1ess if she had to depend 0nlv on those grown at home．Trade makes it possible for her surplus(过剩的)manufactured goods to be traded abroad for the agricultural products_________(64)would otherwise be lacking． A country's wealth is，therefore，much influenced by its manufacturing capacity。__________(65)that other countries can be found ready to accept its manufactures．
51．A．calls B．gets C．depends D．takes
52．A．sense B．article C．side D．area
53．A．distribute B．produce C．contain D．buy
54．A．that B．these C．what D．which
55．A．for B．to C．in D．by