At the end of the meeting, it was announced that an agreement .
A. has been reached
B. had been reached
C. has reached
D. had reached
网友回答
A. has been reached
(答案→)B. had been reached
C. has reached
D. had reached
解析：考查时态。根据语境及时间状语At the end of the meeting在会议结束的时候，可知用过去完成时，选B。句意：在会议结束的时候，宣布已经达成协议。