They stayed with me three weeks ,__they drank all the wine I had .A which B which

题目

They stayed with me three weeks ,__they drank all the wine I had .A which B which
C during which time D during which

答案

选C,C项看作时间状语；D不能选,句子逗号隔开了.A和B用which放在空中后,句意就不合逻辑了.