语法与词汇 Sally was a bit shy, but the teacher found her quite _____ discussing a recent film with others.
【正确答案】 A
【答案解析】句意：萨莉有点害羞，但是老师发现当她和别人讨论近期的电影的时候特别的无拘无束。at home舒适；无拘束。at most最多。at house无此搭配。at heart在内心里。