-I wonder why Mr Green hasn’t showed up at the meeting yet.

-I’m not sure, but he _______ in a traffic jam driving here.

A．could be stuck

B．might stuck

C．might have been stuck

D．must have stuck

盈利能力分析中，常用的经济指标包括（）

A.净资产收益率

B.总资产收益率

C.流动资产周转率

D.销售利润率

E.固定资产周转率