【题目】The retired manager decide to in the mountain village since it was so quiet and the air was fresh as well.
calm down B. settle down C. set down D. fall down
在线课程【答案】B
【解析】句意：因为这里环境静谧、空气清新，这个退休的经理决定在这个山村安顿下来。calm down平静下来；settle down 安顿下来；set down写下来，记下来；fall down 跌落，掉下来。