Тебе нужно в прошедшем времени все это написать
2.Trees are sended to a paper miil
3.Bark removed from the wood
4.Wood choped into small pieces
5/Pieces Become a pulp
6.Paper pulp has been poured into container
7 Pulp Poured onto a large screen
8.water has been drawned from the paper
9.Paper flat has been pressed