Question

1 Six of the following sentences contain mistakes. Find the mistakes and correct them. 1 Sydney Harbour Bridge was building in 1932.
2. While they were carrying out tests in the laboratories, researchers were analysing past
results.
3 The first real road builders in Britain was the Romans.
4 The Romans built roads of layers of broken stones of various sizes and were covering them
with flat stones.
5 The system didn't working because the loudspeaker had been wrongly connected.
6 Before factories were told to stop polluting the environment, waste was being dumped in
rivers and in the sea.
7 Louis Pasteur was discovering the action of germs while he was studying fermentation in
wines.
8 The production process had already been shut down when the leak in the fuel tank was
found.
9 Nuclear energy began to be used from the mid-1950s.
10 In the second half of the 20th century, the electronics industry transforming the way we
work in factories.