What do the five rings on the Olympic flag ___________?
| A．stand by | B．stand up |
| C．stand out | D．stand for |
________，the more expensive the camera，the better its quality.
| A．General speaking | B．Speaking general |
| C．Generally speaking | D．Speaking generally |
Faced with a bill for $10,000，________.
| A．an extra job has been given to John |
| B．the boss has given John an extra job |
| C．an extra job has been taken |
| D．John has taken an extra job |
________ in a white uniform, he looks more like a cook than a doctor.
| A．Dressed | B．To dress |
| C．Dressing | D．Having dressed |
________ around the Water Cube, we were then taken to see the Bird's Nest for the 2008 Olympic Games.
| A．Having shown | B．To be shown |
| C．Having been shown | D．To show |
The storm left，________ a lot of damage to this area .
| A．caused | B．to have caused |
| C．to cause | D．having caused |