单选题
2分
Sally was a bit shy, but her teacher found her quite______ discussing a recent film with others.
参考答案: A
参考解析: 固定搭配 at home doing sth ,意为在某方面没有拘束,熟悉,精通,很在行。题干意为:萨莉有点腼腆,不过老师发现最近她在和其他人讨论电影时一点都不拘束。故选A。