Сделайте пожалуйста, срочно надо!

1. Complete the sentences, using Conditional II and II

1) If we didn't pollute the rivers, they ...(be) full of fish.
2) If Helen had collected his thoughts, she ...(write) her test successfully.
4) If I ...(be) you, I would be consult a doctor.
5) It people took as much rubbish as they could to recycling centers, thay ...(protect) environment from pollution.