One way to get around in big 1. ______ (city)like Beijing and Shanghai is to rent a car. If you cannot 2. ______(driver), you can take a taxi. However, these two ways are too 3. ______ (expense) for most people. Many people like to go by subway or 4. ______ bus. The subway is the fastest way to get around in busy cities. It is now 5. ______ (become) more and 6. ______ popular. Buses are cheap 7. ______much slower than the subway. A cheaper and better way to see a city 8. ______ (good) is to go by bike. But for many people, the 9. ______ (good) and the wisest way to get around in the downtown area is to 10. ______ (walk).