__________ twice a year is the rule that every driver shall obey in this city.
| A．Being examined | B．Examined |
| C．To examine | D．Having examined |
With the help of high technology, more and more substances _________ in the past years.
| A．discovered | B．have discovered |
| C．had been discovered | D．have been discovered |
Jim is the only one of the policemen in his office who __________ the award.
| A．have won | B．win | C．has won | D．was to win |
The company the girl used to work ________ was shut down last month.
| A．for that | B．for | C．for whom | D．/ |
Unless __________, she won’t go to any party.
| A．inviting | B．having invited | C．invited | D．being invited |
__________ his project, the boy had to stay up late.
| A．Not finishing | B．Not finished |
| C．Having not finished | D．Not having finished |