—Was it still there _______ you were away to answer the phone?—There is no doubt about it.
The athletes competed ________ each other for gold medals in the Olympic Games.
--Can a plane fly ________ the Atlantic Ocean?--Yes, but it needs to go________ the clouds for hours.
The room ___________ window is open is mine.
Don’t turn on the radio __________ your mother allows you.
He devotes ________to ________.