The workers have ________ all the materials and they have to stop working now.

问题描述:

The workers have ________ all the materials and they have to stop working now.

The workers have used up / run out all the materials and they have to stop working now.
工人们用完了所有的材料,他们现在不得不停下手中的活.
use up =run out 用光,耗尽