Put the sentences into passive voice. Mind the tenses.
They found oil in the North Sea.
in the North Sea.
We should not leave litter about.
They built new houses in High Street last year.
in High Street last year.
They sell sweets in this shop.
in this shop.
We should not pollute our environment.
They export electrical goods to other countries.
to other countries.
They produce planes in GB.
They export some products to Austria.
They grow coffee in Brazil.
They completed the Capitol in 1865.