单项选择题

If one had to save products instead of money, _________.

A．this would need years of practice
B．coal, for example, would lose its value
C．they could not be stored for years on end
D．many products would lose their value

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热门试题

单项选择题

How many advantages of money are mentioned in this passage？

A．Two.
B．Three.
C．Four.
D．Five.

单项选择题

Using money as a medium of exchange means that _________.

A．you have to sell something in order to buy something
B．you have to buy something in order to sell something
C．you don't have to buy something in order to sell something
D．the seller and the purchaser are the same person