题目内容：

阅读下面材料，在空白处填入适当的内容(1个单词)或括号内单词的正确形式。

Hakka Earth Building is a bright pearl of Chinese civilization. It is praised as a magnificent architectural work of village houses in 1. world for its long history, unique style, smart structure and magnificent scale, which is 2. (close) related to the history of Hakka people in the mountainous areas in Fujian.

Earthen houses are made 3. earth, stone, bamboo and wood, all readily available materials which are used 4. (form) walls up to 6 feet thick. The end result is a windproof, quake-proof building that is warmer in winter and cooler in summer 5. others. The top has gun holes for defensive purposes. In addition to the unique function of defending against the 6. (enemy), the earth building also has the characteristics of fire prevention, guarding against wild animals and good lighting. What is amazing about these earth buildings 7. (be) the fact that some of them are over 700 years old, surviving through natural elements, including earthquakes.

In 2008, a total of 46 Fujiantulou sites 8. (list) as World Heritage Site by UNESCO. They’re exceptional examples of a building tradition and function 9. (represent) a particular type of group living and defensive organization in a 10. (harmony) relationship with their environment.