But for these interruptions, the meeting half an hour ago.
A. was finished
B. would have finished
C. had finished
D. would finish
网友回答
A. was finished
(答案→)B. would have finished
C. had finished
D. would finish
解析：本句是一个含蓄的虚拟语气，but for…要不是，如果没有…；句意：要不是这些打扰，这个会议半小时前就结束了。根据句意说明对会议产生的打扰是过去发生的事情，故使用would have done对过去的情况进行虚拟。故B正确。