-------It’s time to have class. Please stop _________. ----- OK.
— Would you like something to drink? —I’m not thirsty.
—Have you mended your shoes, Bob? —Yes, I _________ them twenty minutes ago .
—Listen! Is Mary singing in the next room? —No. It _______ be Mary.She has gone to Shanghai for an important meeting.
.Hurry up, ________ you’ll not catch the first bus.
The old men in hospital ______________.