我還應有15天的休假。

　　I'm still due 15 day's leave.

　　我們在東京游覽了三天。

　　We did Tokyo in three days.

　　生日賀卡晚到了三天。

　　The birthday card arrived three days late.

　　接通煤氣延遲了三天。

　　Connection to the gas supply was delayed for three days.