— 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
网友回答
A. was waited
(答案→)B. was waiting
C. has waited
D. have been waiting
解析：上句说“你为什么没去参加会议”，据此回答“我当时正在等我妹妹从美国打来的长途电话”，说的是“你们开会时”我正在等一个电话，所以用过去进行时，故选B。