31. We don’t keep winning games _______ we keep playing well.

A. because　　　 B. unless C. when　 D. while

30. The Chinese are proud of the 29th Olympic Games_____　 _　in Beijing in 2008.

A. hold　　　　　　　 B. holding　　　　　 C. held　　　　　　 D. to be held

29. How to protect the rights of the Aborigines best __________ a challenge for the Australian government.

A. looks　　　　　　 B. goes　　　　　　 C. stands　　　　　　 D. remains

28. We hope to become more ________ in predicting earthquakes.

A. accurate　　　　 B. steady　　　　　　 C. ideal　　　　　　 D. absolute

27. Let’s keep to the point or we __________ any conclusions.

A. will never reach　　　　　　　　　　　　 B. have never reached

C. will never arrive　　　　　　 　　　　　　D. have never arrived

26. We tried our best to help them _________ the help they had done to us.

A. on condition that　 B. in honour of　　 C. in return for　　　　　 D. in turn

25. ---Why won’t you travel to Hainan with your colleagues next week?

---________ the cost, it will take a lot of time.

A. Apart from　　 B. Except　　　　　　 C. Except for　　　　 D. As well as

24. ___________ in the countryside made Mr. Wilson very hardworking when he was still young.

A. Bringing up　 B. Being brought up　 C. Having brought up　 D. Brought up

23. The explorers were told to __________ themselves with everything they would need for the voyage.

A. associate　　　　 B. equip　　　　　　 C. relate　　　　　 D. feed

22. Never travel with ___________ who leaves you in case of danger.

A. the friend　　　　 B. that friend　　　　 C. a friend　　　　　　 D. friend