The witnesses ________ by the police just now gave very different descriptions of the fight.                                                             (2013·陕西，14)

A．questioned

B．being questioned

C．to be questioned

D．having questioned

在总承包工程报价时，承包商大都采用( )估价。

A．单位生产能力估算法
B．系数估算法
C．生产能力指数法
D．比例估算法