1. I need to ____ my project for school.

backup
back up
both

2. Do we need to _______ your sister?

backup
back up
both

3. The doctors need _______ in the files.

backup
back-up
both

4. Did the girls _______ their school work?

backup
back-up
both

5. How many people do you need for ______?

backup
back up
both

6. I do not have a _____ copy of the e-mail.

back up
backup
both

7. Can you please ______ the computer?

back up
backup
both

8. Do the girls want to _______ the hard disk?

backup
back-up
both