— Why weren't you at the meeting?　　　　— I for a long distance call from my sister in Ameri

问题补充：

— Why weren 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：上文的语境是过去时间，下文表示过去时间内正在进行的动作。