Tick the correct sentences. Underline the mistake in the incorrect sentences and write the correct word(s):
1. The bank robbers will get out of prison in the 2020.
2. Small boats were used to smuggle drugs across the Mediterranean.
3. In 19th century, prisons were terrible places.
4. Burglars generally prefer to work at night.
5. A Chief of Police congratulated his men on arresting the murderer.