gravel

孩子们喜欢在小石子路上跑来跑去。

The kids love running on the path covered with ___gravel.

工人们用这种粗砾石铺设花园小路。

The workers used ___gravel to pave the garden path.

工人们在花园小径上铺了一层碎石子。

Workers spread a layer of ___gravel on the garden path.