—Did you remember the days we studied in the university?
—Certainly.Especially the hard times we spent together.
A. which；when
B. when；which
C. when；when
D. which；which
网友回答
A. which；when
(答案→)B. when；which
C. when；when
D. which；which
解析：
考查定语从句。第一个空从句中的study为不及物动词，不缺少宾语故用when引导定语从句修饰先行词days；第二个空spend是及物动词且缺少宾语故用which引导定语从句。