—The best things in life are free.
—Couldn’t agree more. Air costs ______, but we can’t live without it.
something
nothing
anything
everything
This box is __________ than that one.
—__________ do you go to the cinema? —Once a month.
Be quick, __________ you’ll be late for school.
—Hi, Mike, I’ve got a present __________ you. —Oh, it’s really beautiful. Thank you very much.
The girl is at school. __________ is busy with her work.