If people ... the seas and rivers they ... millions of fish.
If the air ... clean you... a mask.
More species ... if we ... nature.
We ... the use of natural resources if we ... old and used things.
I can't stand ... soap operas.
They don't mind ... mushrooms in the forest.
My parents enjoy ... .
We are looking forward ... to Paris.
The first telephone ... by Alexander Graham Bell.
The Internet ... all over the world nowadays.
A lot of trees ... in the rainforest theese days.
The castle ... in the 18th century.
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