【题目】But for those interruptions, the meeting _____ half an hour ago．
A． was finished B． would have finished
C． would finish D． had been finished
在线课程【答案】B
【解析】句意：要不是那些干扰，这个会议半小时前就结束了。But for“要不是”，But for those interruptions,=if it had not been for those interruptions,是和过去相反的虚拟语气，所以主句用would have done。故选B。