The boy dived into the water and after ______ seemed to be a long time, he came up again.
It will take _____ time to finish the project.
It is not rare in ____ that people in ____fifties are going to university for further education.
Has ____ how many spies we caught during the war ____ up to now?
You’ve missed your ______ to speak and you have to wait for another round.
More and more people choose to shop in a supermarket as it offers a great ______ of goods.