I can never forget the day we worked together and the day we spent together.
A. when; which
B. which; when
C. what; that
D. on which; when
网友回答
(答案→)A. when; which
B. which; when
C. what; that
D. on which; when
解析：两个先行词the day都是表示时间的名词,但第一个空白处要填的关系词在从句中作状语, 因此要用关系副词when；第二个空白处要填的关系词在从句中作动词spent的宾语,因此要用关系代词which或that来引导定语从句.