Maria _____ missed the first train so as to travel on the same one as John.
Some new oilfields ________ since 1976.
She’s having a lot of trouble with the new computer, but she doesn’t know whom to ________.
________ you’ve heard the song, you’ll never forget it.
The mother asked the boy ________ football in the street. It was dangerous.
—I’m going to the States. —How long ________ you ________ there?