单项选择题

According to the passage, a barter economy can lead to ______.

A．rapid speed of transactions
B．misunderstandings
C．inflation
D．difficulties for the traders
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单项选择题
According to the passage ,who has the greatest degree of control in an administered system
A．Individual.
B．Small businesses.
C．Major corporations.
D．The government.
单项选择题
The first games for the disabled were held ______ after Sir Ludwing Guttmann arrived in England.
A．50 years
B．21 years
C．9 years
D．4 years
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