—The best things in life are free.
—Couldn’t agree more. Air costs ______, but we can’t live without it.
something
nothing
anything
everything
It’s not my blouse. It may be _______________.
Which of the following can NOT be used as subject?
How many students are born _________the star sign of Aquarius in your class?
A: I’m ___________ to eat a horse now! B: Really? But I don’t have ___________for you. It’s a great pity!
Is it important ________us __________ learn English well?