— Why do you do volunteer work in the North—West?
— I_____ to improve the lives of the children there through my efforts.
| A．was trying | B．have tried |
| C．am trying | D．tried |
Try to show what you are _______ of during your short interview for a position.
| A．curious | B．cautious | C．considerate | D．capable |
---Why does the Lake smell terrible?
---Because large quantities of water .
| A．have polluted | B．is being polluted |
| C．has been polluted | D．have been polluted |
The television has many advantages. It keeps us _____ about the _____ news and also provides entertainment in the house.
| A．to know; later | B．informed; latest |
| C．learning; latter | D．to think; latest |
If a person has not had enough sleep, his actions will ___him ____ during the day.
| A．give; in | B．give; away | C．give; out | D．give; up |
___ to advertisements constantly can help to change people's opinions over time.
| A．Exposed | B．Being exposed | C．Exposing | D．To be exposed |