Question

They stayed with me three weeks, _____ they drank all the wine I had.

A. which
B. which time
C. during which time
D. during which

Answer 1

答案C
which不是修饰三个星期，而是修饰前面整个主句。句意为：他们和我呆了三个星期，（在呆了三个星期这段时间里）喝光了我所有的酒。