英语阅读.（3-2）when the need arises is a risk they simply cannot

英语阅读.（3-2）
when the need arises is a risk they simply cannot afford.For this reason,countries,even rich countries,try to keep reserves of foreign currencies around.Just as individuals keep savings to meet emergencies and to cover payments on the television if they are laid off,so do nations attempt to maintain hoards of foreign currencies to cover unexpected events.
The price of any foreign currency expressed in the local currency (say,dollars) is thus a major issue.And it is closely tied to the need to maintain reserves and the desire to manage certain aspects of the domestic economy.Over the past two centuries,a number of international monetary systems have been set up to deal with these questions.All have proved inadequate.The interests of some countries inevitably conflict with the interests of others,and so the system collapses.But in spite of its limitations and faults,the international financial system is important to all of us.
56.Through exchange,both parties attempt to make themselves better off.
A.a gathering of people for food and amusement
B.an association of people having the same political aims
C.a group of people doing something together
D.one of the people or sides in an agreement or argument
57.Just as …and to cover payments on the television if they are laid off,….
A.put aside B.bought without fully being paid for
C.stopped D.dismissed temporarily
58.…,so do nations attempt to maintain hoards of foreign currencies to cover unexpected events.
A.to include B.to spread over C.to protect D.to be enough money for
59.The price of any foreign currency expressed in the local currency…
A.shown in some other way B.shown in words
C.sent by express D.pressed out of something
60.The price of any foreign currency … is thus a major issue.
A.example B.result C.something printed D.a matter of concern

D B A A C