Write the following sentences using present perfect passive voice. teenagers have broken a lot of trees. factories and plants have polluted our rivers. bob has written the words “i love helen” on the tree. these children have dropped a lot of litter in the forest. the pupils of 9 «a» class have collected 30 kilogram’s of wastepaper.

1 a lot of trees have been broken by teenagers.

2 our rivers have been polluted by factories and plants.

3 the word "I love Helen" have been written on the tree by Bob

4 a lot of litter have been dropped in the forest by these children.

5 30 kilogrammes of wastepaper have been collected by the pupils of 9A class.

A lot of Trees have been broken by teenagers.
Our rivers have been polluted by factories and plants.
The words “I love Helen” have been written by Bob on the tree.
A lot of litter have been dropped by these children in the forest.
30 kilograms of wastepaper have been collected by the pupils of 9 “A” class.