Can you tell me ___________________? You look upset.
—Who ______ it be that hasn't handed in his homework? —It ______ be Bob. He handed it in yesterday.
Only those who have experienced hardship ______ well aware of what happiness means.
Even on a cold day he prefers ______ out to play football ______ at home.
It was unwise of him to ______ the unreliable data in his speech.
—Would you mind giving your advice on how to improve our business management? —If you make ______ most of the equipment, there will be ______ rise in production.