Read the sentences and decide which one of the given words fits each gap in the expressions:
1. You need to connect ______ your modem to the telephone line.
2. I need to key this data ______ the database.
3. You need to switch it ______ using this button before you can use it.
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.