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

<上一题 目录 下一题>
热门 试题

单项选择题
He made an immense amount of money in business.()

A. large
B. small
C. limited
D. little
单项选择题
Helen will leave immediately.()

A. far away
B. right away
C. right here
D. soon
相关试题