Put the verbs in the right form.
The 20th century ... \(SEE\) dramatic changes in how people in the UK travelled.
At the turn of the century the rail network ... \(BE\) largely in place.
However, horse-drawn transport was regularly ... \(SEE\) on the roads.
In the 1920's motorised vehicles ... \(REPLACE\) horse-drawn transport.
By the late 1950's new roads were ... \(BUILD\) for motorised vehicles.