---Did you visit the temple?
---No. We _____it, but we spent too much time shopping.
| A．could have visited | B．could visit |
| C．needn’t have visited | D．mustn’t have visited |
The research is so designed that once __________ nothing can be done to change it.
| A．begins |
| B．having begun |
| C．beginning |
| D．begun |
__________ more attention, the trees could have grown better.
| A．Given |
| B．To give |
| C．Giving |
| D．Having given |
__________ many times, he finally understood it.
| A．Told |
| B．Telling |
| C．Having told |
| D．Having been told |
(2009·江西) __________ the right kind of training, these teenage soccer players may one day grew the international stars.
| A．Giving |
| B．Having given |
| C．To give |
| D．Given |
(2009·福建) __________ 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 |