求助各位大牛一道不难的经济学英文题，初学望指教~

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Assume that at the current market price of $4 per unit of a good, you are willing and able to buy 30 units. Last year at a price of $4 per unit, you would have purchased 20 units. What has most likely happened over the last year?

[A] Supply has decreased.

[B] Quantity supplied has increased.

[C] Demand has decreased.

[D] Supply has increased.

[E] Demand has increased.

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关键词：经济学 学英文 Increased Increase decrease 经济学 英文 current willing likely

I choose D

答案是E

答案是E

答案是E

答案是E

The answer should be E. Firstly, please pay attention to the difference between the point move along the curve(B) and the shift of the curve(A/C/D/E), which is the difference between B and other choices. Secondly, pay attention that the question does not ask the equilibrial point, so E should be the most likely one, because the guy is consumer, not a supplier, after the demand curve shifts to the right side, his willing demand should increase under the condition of same price of $4.

B and E
原因楼上已经阐述，不过漏选了B而已

fldxl001 发表于 2013-2-2 09:41
The answer should be E. Firstly, please pay attention to the difference between the point move along ...

谢谢你的分析，非常的好，都理解了，但是我觉得What has most likely happened over the last year?
所以答案应该是C吧

fldxl001 发表于 2013-2-2 09:41
The answer should be E. Firstly, please pay attention to the difference between the point move along ...

非常感谢你的分析，看了一下，理解了，但是题目问的是What has most likely happened over the last year?
所以应该选C吧