1. Now log _on__ to the system.
2. Shut _down__ the computer and leave it.
3. The laptop has gone _off__ again.
4. Type _in__ your username and password.
5. When I try to print _out__ a document the computer prints _out__
a different one.
6. You should really back _up__ all your work.
7. Where do I plug __in_ the computer?
8. If you don’t want to lose your documents, it’s a good idea to
back them _up__ .