问题补充：
They stayed with me for three weeks , they drank all the wine I had.
A. which
B. which time
C. during which time
D. during that time
答案：
A. which
B. which time
(答案→)C. during which time
D. during that time
解析：考查定语从句：句意：他们和我一起呆了三个星期，在那期间，他们喝了我所有的酒。先行词是three weeks，定语从句中缺少时间状语，用介词+关系代词引导定语从句，选C。
