—Your sister’s plan is not quite practical.Why not try to persuade her to give it up?—My sister is very stubborn,so it is________to try to change her mind.
—Next week we’ll have the final English exam. —Yes. Then, every minute must be made full use ________ English.
—Can I help you, sir? —Yes. I bought this radio here yesterday, but it ________.
A left-luggage office is a place where bags ________ be left for a short time, especially at a railway station.
—I heard that they went skiing in the mountains last winter. —It ________ true because there was little snow there.
—Who is the girl standing over there? —Well, if you ________ know, her name is Mabel.