Fill in the correct preposition: 16 If a burglar breaks into your house, always hand ________ your valuables. 17 I ran ________ an old friend at the supermarket yesterday. 18 We ran out ________ milk, so can you buy some when you're at the supermarket? 19 My brother and his friends hang ________ at the shopping centre on Saturdays. 20 I saw two policemen running ________ a robber.

Here are the answers to the preposition exercise:

1. 16: If a burglar breaks into your house, always hand over your valuables.
2. 17: I ran into an old friend at the supermarket yesterday.
3. 18: We ran out of milk, so can you buy some when you're at the supermarket?
4. 19: My brother and his friends hang out at the shopping centre on Saturdays.
5. 20: I saw two policemen running after a robber.