_____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 |
By the end of last week, we __________ a satisfactory solution to the problem.
| A．have found | B．will be finding | C．had found | D．found |
A large sum of money has been raised the poorly-educated children in the mountainous areas.
| A．in return for | B．for the benefit of | C．in search of | D．in memory of |
I shall never forget those years ________ I lived on the farm _______ you visited last week.
| A．when; where | B．which; which | C．when; which | D．which; where |
.Although it had been______ struggle for him to finish the experiment, he enjoyed the result with________ satisfaction.
| A．the, / | B．a, / | C．a, a | D．/, a |
― Did you go to the 2010 Shanghai World Expo?
― Yes, my father took me there. It was really __________!
| A．a great fun | B．a fun | C．great fun | D．a great funny |