2 Complete the article with so or because. A London school has raised £10 000 this year for WaterAid in Africa. Students at Riverside School organized jumble sales, concerts, pet shows and sponsored walks during the year . And students in one class washed cars at the weekends. Anna Hunter, a student in Year 9 at Riverside School, said: We chose the charity WaterAid (1) water is so important in our lives. We don't have problems with water in this country, (2) we often waste it. But in many parts of Africa people have to walk many kilometres to get it. Twelve-year-old Luke Wise washed 300 cars during the year and raised £1500. 'I did it (3) - I felt sorry for all the people in the world without water,' he said. The headteacher of Riverside School, Serena Black, is delighted. 'We've never raised so much money before. We hope to raise money for WaterAid next year, too, (4) - our fundraising has been such a success this year.'