这家工厂专门将原木加工成建筑材料。

This factory specializes in ___processing logs into construction materials.

那个疲惫的工人拖着沉重的脚步慢慢穿过工地。

The tired worker ___lumbered slowly across the construction site.

车库里堆满了已成为无用杂物的旧家具和箱子。

The garage is full of old furniture and boxes that have become ___lumber.