[w58] Because of the financial crisis, days are gone ______

翻译：由于金融危机,那些当地五星级宾馆一晚只索价/收费6000元的日子一去不复返了.
1.主句主干是days are gone,“时期过去了”.
后面是一个定语从句,修饰该句的主语days,即“...的日子/时期”.
2.同样,把先行词days放入该定语从句中,它不能单独做成分,只能加上介词一起做该从句的时间状语.即：
local 5-star hotels charged 6,000 yuan for one night (in/during the days)
= local 5-star hotels charged 6,000 yuan for one night (in/during which)
= (in/during which) local 5-star hotels charged 6,000 yuan for one night
= (when) local 5-star hotels charged 6,000 yuan for one night
在那些日期/日子中,当地那些当地五星级宾馆一晚只索价/收费6000元.

因为经济危机，那当地5星及宾馆住一晚收费6000的日子已经一去不返了。
首先确定是定语从句修饰days ,时间定语从句用when