问题补充：
After graduating from college，I took some time off to go travelling , turned out to be a wise decision．
A. that
B. which
C. when
D. where
答案：
A. that
(答案→)B. which
C. when
D. where
解析：本题考查短语从句。句中which引导非限定性定语从句，指代前面一件事。句意：大学毕业之后，我花了些时间去旅游，结果证明是明智的选择。
