—What should I do, doctor?
—You should take more exercise ______ healthy.
| A．to keep | B．keep | C．keeping | D．kept |
—Maggie, why did you take a bus today?
—Oh, I forgot to tell you about that. My bicycle ______ yesterday.
| A．lost | B．is lost | C．was lost | D．has lost |
—Someone is knocking at the door. Who ______ it be?
—It ______ be Victor. He went to London yesterday.
| A．can; mustn't | B．can; can't |
| C．will; must | D．may; needn't |
When the firemen arrived, the fire had been ______
| A．put off | B．put down | C．put away | D．put out. |
—______ city Rio de Janeiro in Brazil is！
—Yes. The 3lst Olympic Games will be held there.
| A．How lively | B．What busy |
| C．How a big | D．What a beautiful |