—Why did the car hit the tree?

—Why did the car hit the tree?

—Because the driver ________ on the phone at that time.

A. talk B. was talking C. is talking D. talks

【答案】

B

【解析】

句意：——为什么小汽车撞到了树上？——因为司机当时正在打电话。考查过去进行时。根据问句“Why did the car hit the tree?”可以判断动作发生的时间是过去，再根据时间状语at that time（那时）可知句子中的动作在过去某个时刻正在进行着，且动作在一段时间内持续进行，所以用过去进行时，过去进行时的构成是：主语+was/were+动词的现在分词，主语是thedriver所以be动词用was，talk的现在分词是talking；故答案选B。