The most urgent problem any economic system faces is how to use its scarce resources.A:puzzling B:difficultC:terrifying D:crucial
The most urgent problem any economic system faces is how to use its scarce resources.
A:puzzling
B:difficult
C:terrifying
D:crucial
B:difficult
C:terrifying
D:crucial
参考解析
解析：urgent“紧急的”和crucial“至关紧要的”含义最接近。该句句意是：任何经济体系所面临的最至关紧要的问题是如何使用它稀少的资源o puzzling"（使）迷惑的、（使）为难的”;difficult“困难的”;terrifying"（使）感到恐怖的”。
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