Watch the video and answer the question.

1. In what year was the world’s first subway line completed?
1. 1763
2. 1840
3. 1863
4. 1893
5. 1963
2. How long was the first line?
1. 1 mile
2. 2 miles
3. 4 miles
4. 5 miles
5. 23 miles
3. On the first day, how many people traveled on the line?
1. 250
2. 1,000
3. 10,000
4. 25,000
5. 30,000
4. The first line was built using what method?
1. Trench digging
2. Pneumatic drilling
3. Dynamite explosion
4. Deep tube digging
5. Cut and cover
5. After 30 years, London’s subway system had extended to _______.
1. 10 kilometers
2. 15 kilometers
3. 50 kilometers
4. 80 kilometers
5. 180 kilometers