【题目】Whatever is left over may be put into the refrigerator, _____ it will keep for two or three weeks.
A. when B. which C. where D. while
在线课程【答案】C
【解析】
试题分析：考查定语从句。句意：无论剩下什么东西，都可以放入冰箱中，在那儿可以保存两三个星期。where it will keep for two or three weeks是定语从句，关系副词where在从句中作地点状语。故选C。