Read the text again. Are the following statements true (T) or false (F)?

There is only one definition of the word ‘tunnel’. T F
An underpass is shorter than a tunnel. T F
Tunnels are made only for vehicles. T F
The word ‘subway’ means the same in the UK and the USA. T F
The construction of a tunnel depends much on the ground conditions. T F
There are different methods of excavation. T F
Tunnels are not absolutely safe. T F

A TUNNEL BORING MACHINE (TBM)


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