for a whole night, we still couldn't agree on when to start and where to go for the holi

for a whole night, we still couldn't agree on when to start and where to go for the holiday.
A. Discussed
B. Having discussed
C. Discussing
D. Being discussed

A. Discussed(答案→)B. Having discussedC. DiscussingD. Being discussed解析：B 考察非谓语动词。句义：讨论了一整个晚上，在何时出发，去何地度假的问题上大家仍然不能达成一致意见。主语we和动词discuss是主动关系，应该使用现在分词；discuss动作发生在句子动作之前，应该使用现在分词的完成式。故B正确。

这个问题的回答的对