A feather falls slower than a stone only because the air holds the feather back more than it ______ the stone.
John is ill and has been __________ by Tom in our team in tomorrow's football match.
She concentrated her energies __________ her test.
My deskmate and Tom are similar __________ each other __________ character.
The company,__________ in 2003, is one of the most famous compa-nies.
—How often do you eat out?—__________,but usually once a week.