The telephone lines werebrought down by the _____ trees and branches.

The initial tunnels were just ___________ the surfaceof the ground. People were transported in carriages, which were ___________ thenarrow tunnels by steam engines.

The Charles Dickens Museum in Doughty Street is the only one of his London homes to survive, ________ he wrote Oliver Twist.

How cold it is! We’ve never had ______this winter

An old soldier gave us a lecture a moment ago. In his lecture, he told us ________ in Wuxi inthe old days.