16. Don't leave the lights on all night, you will waste electricity.
If
17. The furniture was too old to keep.
It was............................................... .................................................. .............
18. Gary is the best guitarist in her class.
No one else.............................................. .................................................. .................
19. It's necessary for everybody to clean up their neighborhood once a week.
Everybody......................................... .................................................. .....................
16. Don't leave the lights on all night, you will waste electricity.
If you leave the lights on all night, you will waste electricity
17. The furniture was too old to keep.
It was such old furniture that I couldn't keep
18. Gary is the best guitarist in her class.
No one else in Gary's class is as good at playing the guitar as her
19. It's necessary for everybody to clean up their neighborhood once a week.
Everybody has to clean up their neighborhood once a week