Complete the text with the correct form of the verbs in brackets.
A STORY OF CHANGE

La Paz School is a rural school in the mountains of Central Colombia. A few years ago, teachers and students _____________ (decide) to do something about the environmental problems they had. Deforestation and bad management of waste ___________ (be) their main concerns. As a result, they ___________ (create) an environmental group to look for solutions. First, they ___________ (research) information about the people, their businesses and the impact of their actions. Then, they _____________ (organize) a campaign to protect the rivers in their town. They __________ (talk) to the local authorities about prohibiting the industries from dumping waste. They ____________(start) teaching people about recycling methods and the whole town __________(sign) a petition to stop the destruction of their forests. They ___________ (plant) more than 2,000 trees near the river. Now people in our town ___________ (be) happy with the results. Liliana, a 15-year-old student at La Paz School, said: ‘Now we ____________ (have) lots of trees around our houses and parks; the rivers are clean; and we understand that when people work together to support a cause, the little things that everyone __________(do) can create big changes.