—When did Bob leave? —I have no idea. I

问题选择题

—When did Bob leave?

—I have no idea. I ________ a shower upstairs.

A．took

B．have taken

C．was taking

D．would take

答案

答案：C

C 考察动词时态。句意：我不知道。当时我在楼上洗澡。根据句中的did可知，在Bob离开的那个时刻，我正在洗澡。过去进行时强调在过去的某个时间正在进行的动作。故C正确。