—Yes. How time flies!
—Sorry, I have too much homework to do.
—Because he didn't hand in his homework again.
—Is this yours?
—I think so. They canhardlykeep out the cold now.
—Thanks for your advice.
—It means that you can ________ the red button to set off the alarm when there is a fire.
—Sure. You can put in here.
—¥500.
—It must ________ Cathy. I saw her read it just now.
—Yes, it's yours. ________ is in my bag.