1a: i want .. (organise) a
clean-up day.
b: can i. (join) you?
2 a: i'd love
(help) poor
people in other countries.
b: you could
(donate)
money to a charity.
3 a: we should all do something
(protect) the environment.
b: yes, people need to stop
(cut) down so many trees.
4 a: what can i do
(reduce) air pollution?
b: you could try
(walk)
instead of driving to school.
