阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式。
Zhoukoudian is a small village situated about 50 kilometers to the southwest of Beijing. In the 1920s, archaeologists discovered some prehistoric human bones there which changed people's view of China's history. They came an unknown species of man and were the first evidence of human life in China thousands of years ago. The remains were three (tooth)!
In 1929, a complete skull (dig) out. Eventually, archaeologist found almost 200 items, including six skulls and more than 150 teeth. These discoveries proved the (exist) of a human species who lived in the area between 700,000 and 200,000 years ago. Four sites Beijing Man and his relatives lived were discovered on the northern face of Longgushan.
Zhoukoudian was listed a World Heritage Site in December 1987. It has not only given (we) important information about prehistoric Asian societies, but also provided amazing evidence about the process of evolution. Today, parts of the caves have been badly affected by rain. Some areas are almost (complete) covered in weeds, causing serious damage. Pollution (cause) by the nearby factories has also contributed to the problem. This is a very serious matter and the Chinese Academy of Sciences is doing all it can (raise) public awareness of it.
答案:【1】from【2】teeth【3】was dug【4】existence【5】where【6】as【7】us【8】completely【9】caused【10】to raise