The novel written by the author________ well,but five years ago no one could have imagined how

great a role he ________in the literary world. [ ]

A. sells; was to play  

B. selling; was playing

C. sold; had played  

D. sell; is playing

资本资产定价理论提出的自身理论假设有______。

A．市场上存在一种无风险资产
B．市场交易是充分的
C．市场效率边际曲线只有一条
D．风险是可以计量的