问题补充:
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
答案:
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。