50．答案： or

49．答案： an

48．答案： when\after.

20. sheep

21-25. CCDCB 　26-30ABACD　　　　　　 31-35.BBCDD

36-40.　 DACBC　　 41-45. DABCA　　 46-47. BD

16. July　 17. the same idea　　 18. farmhouse 19. picnic basket

10、be done by hand

The Great Wall of China

Good morning, everyone！

I’m here to tell you something about the Great Wall of China.

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　　　 Thank you for your attention.

2010年保靖民中暑假分科考试

英　　 语

1-10. ACCAA　 6-10CCBBA　　　　 11-15. BCBAC

9、keep the enemy out of his empire(帝国), Emperor Qin Shi Huang had all the walls joined up

8、unite the different parts into one empire during the Qin Dynasty

7、put up more walls to defend the borders(边境) of the different kingdoms during the Warring States Period(战国时期)

6、build the first part during the Spring and Autumn Period.