D Fill in the correct preposition.
e.g. Keep your mobile phones switched on at night.
- His sister and her friends hang at the harbour at weekends.
- I've run out of bread, so I'll buy some after work.
- If a burglar breaks into your flat, you should hand over your money.
- She saw a policeman running after a robber.
- Tom ran into an old friend when he was at the shopping centre.