Winter is the time of year ─── the days are short and nights are long

问题描述:

Winter is the time of year ─── the days are short and nights are long
A that
B which
C when
D whose
我知道应当选C 请问为什么

你可以用排除法啊,A和B作主语,而在此从句中已经有了主语,所以A和B没有位置.D就更不通了,whose the days 根本没这说法.