晚饭后，他们在沙发上安顿下来看电影。

After dinner, they ___settled ___down on the couch to watch a movie.

老师让学生们安静下来，开始上课。

The teacher asked the students to ___settle ___down and begin the lesson.

母亲温柔的声音足以让哭泣的婴儿安静下来。

The mother's gentle voice was enough to ___settle the crying baby ___down.