C. Complete the sentences with the correct word. • heavy • cost • helpful • convenient. peace 11. We went for a walk in the country, because we needed some . . . and quiet. 12. In a big city, you will always find . . . public transport 13. She spent the day in London, but found the streets very . . . . 14. My father hates driving in . . . traffic. 15. In the country you usually meet friendly and people. afternoon​