Our headmaster insists that every student of our school full use of his time to get ready for the final exams.
—What a beautiful day! —Yes. It's ____ that I'd like to take a walk.
People have heard what the President has said; they are waiting to see ____ he will do.
Last night the party lasted five hours _____ it was over.
—Did David make his model plane himself? —He ___, because he doesn't know much about model plane.
— Four dollars a pair? I think it’s a bit too much. — If you buy three pairs, the price for each will to three fifty.