他慢慢地展开卷起的地图，寻找目的地。

He slowly ___unrolled the folded map to find the destination.

当我松开橡皮筋时，地图自己展开了。

The map ___unrolled by itself when I released the rubber band.

老师逐步展开故事的情节，让学生们更好地理解。

The teacher ___unrolled the plot of the story step by step for the students to understand better.