1. How has Vietnam's transportation system changed over the past 10 years?
2. What was used as the main means of public transport in Hanoi?
3. Why was the construction of the Thu Thiem tunnel delayed?
4. When will the first metro in Saigon be put into operation?
5. How long is the railroad of Vietnam in total?
6. Where is the Hai Van Tunnel situated?
7. How many compartments do the first skytrains in Vietnam have?
8. How had people in Vietnam traveled before the first motorbike was imported?
Mình chỉ làm được bài 1 thôi, bài 2 phân vân quá :(((