1. Grammar. More than a third of all paper is recycled. How does it happen? Fill in the gaps with the verb from the box in the passive form.

Okay, let's look at the sentence 'Wood is cut into pieces.' This sentence is already in the passive form. Now, let's fill in the missing parts of the text about paper production using the passive form of the verbs given in the box: A. Producing paper starts in a tree. Every fifth tree in the world **is used** to make paper. B. The wood **is cut** into small pieces. C. The wood chips **are mixed** with water to produce a pulp.