If people ... the seas and rivers they ... millions of fish.
will pollute ... kill
pollute ... will kill
pollute ...kill
will pollute ... will kill
If people ... the seas and rivers they ... millions of fish.
will pollute ... kill
pollute ... will kill
pollute ...kill
will pollute ... will kill
If the air ... clean you... a mask.
is not ...will wear
will not be ... will wear
is not ...wearing
won't be ... wear
More species ... if we ... nature.
survive ... protect
will survive ... will protect
survive ... will protect
will survive ... protect
We ... the use of natural resources if we ... old and used things.
reduce ... recycle
will reduce ... recycle
will reduce ... will recycle
reduce ... will recycle
I can't stand ... soap operas.
watch
to watch
watching
to watching
They don't mind ... mushrooms in the forest.
to pick up
pick up
picking up
to picking up
My parents enjoy ... .
travelling
travel
to travel
to travelling
We are looking forward ... to Paris.
to travel
travelling
to travelling
travel
The first telephone ... by Alexander Graham Bell.
is invented
invented
was invented
will be invented
The Internet ... all over the world nowadays.
is used
used
was used
is using
A lot of trees ... in the rainforest theese days.
were cut down
are cut down
cut down
is cut down
The castle ... in the 18th century.
was build
is built
were built
was built
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