Put the verbs in brackets in the correct form. give reasons.
1. a: 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 ( donate) money to a charity.
3. a: we should all do (protect) the environment.
b: yes, people need to (cut) down so many trees.
4. a: what can i do (reduce) air pollution?
b: you could try (walk) instead of driving to school.