这条蛇有美丽的黄黑相间条纹。

The snake has beautiful ___banded patterns in yellow and black.

为了统计方便，学生们按身高被分成了几组。

The students were ___grouped by height for easier statistics.

这些文件用橡皮筋捆在一起。

The documents were ___bound together with a rubber band.