问题补充:
for a whole night, we still couldn agree on when to start and where to go for the holiday.
A. Discussed
B. Having discussed
C. Discussing
D. Being discussed
答案:
A. Discussed
(答案→)B. Having discussed
C. Discussing
D. 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。