His technique has developed to the point _____ he can help kill the latest computer virus going round the city.
| A．that | B．which | C．when | D．where |
__________ such heavy pollution already, it may now be too late to clean up the river.
| A．Having suffered | B．Suffering |
| C．To suffer | D．Suffered |
__________ with arms, the soldiers determined to fight against the terrorists.
| A．Equipped | B．Equipping |
| C．To be equipped | D．To equip |
__________ in her most beautiful skirt, the girl tried to make herself __________ at the party.
| A．Dressed; noticed | B．Dressing; noticed |
| C．Dressed; noticing | D．Dressing; being noticing |
The farmers built long fences, __________ keeping the wild dogs out of them.
| A．aim at | B．aim for | C．aiming at | D．aimed for |
Once __________, the play was well received by the public.
| A．perform | B．performing |
| C．performed | D．to perform |