Read the sentences and decide which one of the given words fits each gap in the expressions:
1. There was a fire and they had to shut ______ the main computer.
2. I need to key this data ______ the database.
3. I'll print ______ the relevant information.
4. It's not enough to just delete the information. It is still there and can be recovered. You need to wipe it ______ with a special program.