赞题库-背景图

单项选择题

The most crucial problem any economic system faces is how to use its scarce resources.

A．puzzling
B．difficult
C．terrifying
D．urgent

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热门试题

单项选择题He invested a considerable amount of money in the project.

A．immense
B．positive
C．powerful
D．realistic

单项选择题The government is debating the education laws.

A．discussing
B．defeating
C．delaying
D．declining