04-05-11

１１. A situation in which an economic market is dominated by a _____ is known as a monopoly.

A. single of a product seller

B. product single of  a seller

C. sller of a product single

D. single seller of a product

答案是Ｄ，可是Ｂ为什么不行呢？

d means: a single seller dominate the market

b means: a product dominate the market

呵呵，我怎么一下就犯傻了呢

真是感谢gre3333 小ＭＭ！！！