The meeting by the time I got there yesterday.
A. was on
B. has been on
C. had begun
D. has begun
网友回答
A. was on
B. has been on
(答案→)C. had begun
D. has begun
解析：考查时态。根据时间状语by the time I got there yesterday在我昨天到达那儿之前，可知用过去完成时连用。句意：在我昨天到达那儿之前，会议已经开始了。