Complete the sentences with the correct word derived from the word in uppercase

1. Fossil fuels are not
   [ ] resources of energy.
2. Celsius is a unit of
   [ ] for temperature.
3. May I
   [ ] this mobile phone for another one, please?
4. My mobile phone has got a very good voice
   [ ].
5. Does this camera come with a guarantee
   [ ]?
6. In remote areas people use a small
   [ ] to produce electricity.