23- Why weren’t you at the meeting?　　- I for a long distance call from my sister in Amer

问题补充：

23．- Why weren’t you at the meeting?

- I for a long distance call from my sister in America.

A. was waited

B. was waiting

C. has waited

D. have been waiting

答案：

A. was waited

(答案→)B. was waiting

C. has waited

D. have been waiting

解析：考查时态。句意：你为什么没有开会？——我正在等一个来自美国我的妹妹的一个长途电话。根据语境可知下文描述的是刚才正在进行的动作，所以用过去进行时态。选B。