____ twice, the postman refused to deliver our letters unless we changed our dog. 
| A．Being bitten | B．Bitten | C．Having bitten | D．To be bitten |
29. The film is ______ a film. It is also a good material for education.
| A．more than | B．no more than | C．not more than | D．not less than |
28. The water will be further polluted unless some measures ______.
| A．will be taken | B．are taken | C．were taken | D．had been taken |
27. More and more Chinese women are having difficulty ______ Mr. Right or are choosing the single life.
| A．to find | B．finding | C．found | D．in being found |
26. He returned home very late as ______.
| A．normal | B．usual | C．common | D．Ordinary |
25. As soon as I got home, my father asked ______ with me.
| A．what the matter was | B．how the matter was |
| C．how was the matter | D．what was the matter |