Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 20 to 24.
Some people love cities, and other people hate them. But more people than ever are choosing to live in one. Cities will be bigger than ever. A megacity is a city with a population of over 10 million people.
Megacities around the world face the same problems: traffic and housing. São Paulo, Brazil, is a good example. "There are 30 million daily trips in São Paulo," says Jorge Wilheim, a city official. "One-third is public transport, one-third is private cars, and one-third is walking. Sixty to seventy percent should be on public transportation." The city is building a new freeway and adding to the subway system, but it's slow work. Every day, millions of people are sitting in traffic jams.
Housing is also a serious problem for the 18 million people in São Paulo. Most of the jobs are downtown, and houses and apartments are very expensive there. So workers live in cheaper places far away from their jobs and commute for many hours. And many new residents can't find any housing for their families, so they live in slums. These are places where people find empty land and build small huts. Ilson da Silva is one man who has done this. When he came to the city six years ago, he didn't have a job. He built a one-room hut next to a garbage dump. Now he works as a janitor, and his house has three rooms and a flower garden. The government has brought in running water and electricity, and the slum is becoming a real neighborhood. For Ilson, and for millions of other people, megacities mean hope for a better future.
