able的名詞形式是

　　His outstanding ability earned him a place on the team.

　　他非凡的能力為他在隊中贏得了一席之地。

　　Both are blessed with an uncommon ability to fix things.

　　倆人都有幸具有不尋常的修理東西的能力。

　　What criteria are used for assessing a student's ability?

　　用什么標準來評定一個學生的能力？