Question

【题目】––I didn’t see you at the party yesterday. Why?

––Because I _______ for an important person at that time.

A. was waiting B. is waiting C. will wait

Answer 1

【答案】A

【解析】句意：——昨天我在聚会上没有看见你。为什么？——因为在那时我正在等一个重要的人。根据at that time可知此处用过去进行时，故为was waiting，故选A。