His mother was in hospital. He asked for to look after his mother.A. three-day’s sick lea

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。