—I need some fresh air, so I’m going out for a walk.— .
—How long can I keep the book? —A week. You _____to return it by Monday.
—Why not take this road? It’s a short cut. — I am afraid we can’t. It _____.
__________ he is old, the old man still insists on studying at a night school.
__________! Let’s go there and have a look at it.
My father bought me _____ mp3, but I lost _____ mp3 yesterday.