We may find that learning a foreign language does not have to be________learning our mother tongue,but can in fact be twice ________.
He is believed____________ in at his office on his way home.
—What would you wish to do if you were a college student again?—That's very hard to say, but I wish I when I was a college student.
Peter won't drive us to the station. He has___________ to take us all.
Mr. Smith__________ the roll of film as soon as he arrived home
He had little idea that it was getting so late, ___________ ?