题目内容：

定语从句 I still remember the night of last month ( ) she left the house alone
A in that B at which C on which D during which
选择原因,

优质解答

C
原因：前面的表示时间的词是the night,表明是某一天的晚上,已经明确了是一天的,那么所用的介词就是on,举例：On that day,I went to the park.
所以选c
A是in,在表时间里,通常是in the month,这里的month 是形容the night的,所以应该看the night,而不是 the month.
B 的at 通常用at night,是短语,但是这里有the,通上,有了日期,所以不用that
D during表示是一个阶段,例如 during these days.