In 1863the first underground passenger railway in the world opened in London. It ran for just under seven kilometers and allowed people to avoid terrible 61__________(crowd) on the roads above as they travelled to and 62_________ work. It took three years to complete and was built using an interesting method.
crowds
from
This included digging up the road, 63___________ (lay) the track and then building a strong roof over 64________ top. When all those had been done, the road surface was re ...