Never before ____ such a smoke in the room.
| A．have I read | B．did I read | C．do I read | D．am I reading |
___ many times, he finally understood it.
| A．Told |
| B．Telling |
| C．Having told |
| D．Having been told |
___ the right kind of training, these teenage soccer players may one day became the international stars.
| A．Giving |
| B．Having given |
| C．To give |
| D．Given |
___ not to miss the flight at 15:20, the manager set out for the airport in a hurry.
| A．Reminding |
| B．Reminded |
| C．To remind |
| D．Having reminded |
___ twice, the postman refused to deliver our letters unless we chained our dog.
| A．Being bitten |
| B．Bitten |
| C．Having bitten |
| D．To be bitten |
___ for the breakdown of the school computer network, Alice was in low spirits.
| A．Blamed |
| B．Blaming |
| C．To blame |
| D．To be blamed |