—Listen! Peter is singing in the classroom!—It _____ be him. He has gone back to his hometown.
All ______ is needed is a supply of oil.
In fact the Swede didn’t understand the three questions ______ were asked in French.
She's never been there, ___________ ?
Henry ______ a short-story writer.
To my surprise, most ____students in this class became ______doctors after they had finished school.