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。