He said that he dropped his bag when he ______ for the bus.

a. was runing   b. was running   c. were running   d. is running

从其立足点和出发点来看，下列房地产定价方法中与其他三种方法不同的是( )。

A．成本导向定价法

B．需求导向定价法

C．竞争导向定价法

D．比较定价法