综合语言运用：谈论个人成长经历 — 英语填空题

请根据提示，用英语写一个连贯的句子，谈谈 Leo 的成长经历：Leo used to be shy; he joined the school drama club two years ago; he now speaks confidently in front of the class. 写出一句话：Leo used to be shy, but after joining the school drama club, he became ___ and now speaks confidently in front of the class.