Thank you for all your hard work last week. I don’t think we it without you.
| A．can manage | B．could have managed | C．could manage | D．can have managed |
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 |
__________ more time, they will do a better job.
| A．Having given | B．To give | C．Giving | D．Given |
__________ with such a difficult problem, he decided to ask for some good advice from his colleagues.
| A．Having faced | B．Face |
| C．Faced | D．To have faced |
The leader came into the room, __________ by his two assistants.
| A．following | B．follow | C．followed | D．to follow |