quickly的形容詞形式是什么？

　　He's a quick study.

　　他學東西特別快。

　　Could I have a quick word with you?

　　我能跟你快點兒說句話嗎？

　　There is no quick fix for the steel industry.

　　鋼鐵工業的問題沒有即時解決的辦法。

　　Here's a dish that is simple and quick to make.

　　這是一道簡單易做的菜。

　　He made a quick exit to avoid meeting her.

　　他迅速離去以避免見到她。