用括号里所给词的适当形式填空。（5分）

用括号里所给词的适当形式填空。（5分）
小题1:We are worrying about his _________ (ill).
小题2:I live on the _________ (twelve ) floor.
小题3:Did you have fun ___________ (camp)?
小题4:Our teacher often tells ___________ (interest) stories to the class.
小题5:He plays football very ___________ (good ).