Jane is so shy that she is afraid of.(speak) in front of a group.空填写speak的什么
问题描述：
Jane is so shy that she is afraid of.(speak) in front of a group.空填写speak的什么
Jane is so shy that she is afraid of.(speak) in front of a group.空填写speak的什么形式,用到了什么知识点,求详解 ,
答
speaking.是词组be afraid of doing