—Who______ it be that is knocking at the door? —It ______ be Father, but I’m not sure.
Most products, ____ which this is one example, sell well, _______.
-- Why do you look so worried? -- My computer broke down and my essay _____ since.
The company has just launched an advertising campaign to ____ their newly produced bicycles.
–Peter, I’d like to have a talk with you tonight. – ______. Have what with me?
–I’ll come to see your performance at 10:00 tomorrow morning.–I’m sorry, by then my performance_____ and I _____ reporters in the meeting room.