As we all know, he has regretted wasting the precious time he should have studied hard pla

发布时间：2020-08-16 06:22:54

As we all know, he has regretted wasting the precious time     he should have studied hard  
playing puter games at school.
A. where
B. that
C. on which
D. when

网友回答

(答案→)A. where
B. that
C. on which
D. when
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