单项选择题


A．controls
B．overtakes
C．predominates
D．overwhelms
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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
单项选择题
In the second paragraph, the word real in real goods could best be replaced by which of the following
A．High quality.
B．Concrete.
C．Utter.
D．Authentic.
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