His mother was in hospital. He asked for to look after his mother.
A. three-day’s sick leave
B. three day’s sick leave
C. three days’ sick leave
D. three-days’ sick leave
网友回答
A. three-day’s sick leave
B. three day’s sick leave
(答案→)C. three days’ sick leave
D. three-days’ sick leave
解析：根据句意，这是说请三天的假。主要考查名词的复合形式。