Never before can we witness such a preposterous state of affairs as we are seeing today.can we wit
问题描述：
Never before can we witness such a preposterous state of affairs as we are seeing today.can we wit
ness 处改错
a could we have witnessed
b havewe witnessed
c should we witness
d could we witness
答案d,我选的b,
why
详细的解释,谢谢了
答
改错的选择题?从句子的角度B是有道理的,但是改错的话从can 到could 而不是have更有道理.