II. Fill in the blanks using the words in the box from exercise I.
1. There are_______ flights from Ha Noi to Ho Chi Minh city. There are planes leaving every two hours. 2. It's much more__________ to travel by car than motorbike when it's raining. 3. Trains are more__________ than buses. They are rarely late. 4. You need to buy a__________ to go on public transportation. 5. People can help protect the environment by taking public transportation. It is more__________ than going by car and motorbike. 6. Buses, trains, and the subway are types of__________ transportation. 7. Taxis are more__________ than buses because they can take you anywhere you want to go.