Change the verbs in italics form the active voice into the passive voice: The paper that we are using each day stars as wood on a tree very far from here. Men and machines make the wood into paper in a factory, which people have to carry by truck and put into stores. At every step in the process the factory has to pay people for their work. And the factory has to use money for buying and repairing the machines, and so on. Of course, everyone concerned has to make profits , too. Even a very thing like a piece of paper has a long history story behind it. Economists try to understand how all the parts of the long story are related.