III Open the brackets using Conditional I - 3 points
1) Soon the Earth's resources (be exhausted) if the human population
(continue) to grow.
2) People
(run out of) drinking water one day if they
(not use)
it more rationally.
3) If he
(want) to help the planet, then he
(have to)
change his habits.
4) Some islands
(be) underwater, if sea levels
(rise).
5) People
(not drop) litter on the pavement, if there
(be) more rubbish bins in towns.