问题
选择题
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
答案
答案：C
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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
答案：C
