Across
- 3. Beijing and _____ have the world's longest metro systems.
- 5. a type of train that uses electromagnetic force
- 6. What city has China's oldest metro system?
Down
- 1. The world's oldest metro system is located in _____.
- 2. Shenzhen's metro system has _____ more lines than Hong Kong does.
- 4. Of the four metro systems mentioned in the paragraph, this city has the fewest daily passengers.