Sandy likes playing ___ baske tball, but she doesn’t like playing ___ piano.
The air in the country is ________ than ______ in the big city.
________ people can use computer in the old days.
The number of the books in our school library _______ about50,000.
Something terrible _______him these days. Do you know what’s wrong?
--- I'm feeling so tired now. --- ___________stop and have a rest?