Our city is one of _________cities in china.
| A．the biggest | B．biggest | C．bigger | D．the big |
The river will be dirtier and dirtier________we do nothing to protect them．
| A．since |
| B．if |
| C．unless |
| D．until |
—________
—I have a fever．
| A．How are you doing? |
| B．Are you all right? |
| C．What’s the matter with you? |
| D．Do you have a fever? |
—Mum，I have a cold．
—You________go to a doctor．I’ll take you to hospital．
| A．should |
| B．shouldn’t |
| C．need |
| D．needn't |
The doctor advised my father to________smoking．
| A．get up |
| B．stay up |
| C．put up |
| D．give up |
They are used to________classical music and it makes them feel relaxed．
| A．listen |
| B．listen to |
| C．listening |
| D．listening to |