... 1868. It (1 ) like any railway signal of the time, and was operated by gas. (2 ) , it exploded and killed a policeman, and the accident discouraged further development until carsbecame common. (3 ) ... Day.A. decorated B. to decorate C. decorate D. decorating26. Since they came, we able to work on the project.A. are B. were C. have been D. have to be27. In addition the news, television provides ... below. Then decide which word A, B, C or D best fits each space : ( 10p )Traffic lightsThe first traffic signal was invented by a railway signaling engineer. It was installed outside theHouses...