Is_possible to fly to the moon in a spaceship?
—I didn't go to work yesterday afternoon because my car broke down. —You ___ mine. I wasn't using it.
After supper she would sit down by the fire,sometimes for ______ an hour,thinking of her young and happy days.
Henry can't attend the party ____ at Tom's house at present because he is preparing the speech at the party ____ at Marie's house tomorrow.
-- Will you go skiing with me this winter vacation? -- It __________.
My study of maths has ____ much of my time, but it has given me a great deal of enjoyment.