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。The Great Wall of the ancient Qi State,the oldest【小题1】(exist) Great Wall in China, stretches across Shandong for more than 600 kilometers. It【小题2】(build) during the Spring and Autumn Period and the Warring States Period.
“Historical records say the Qi State built the wall here to defend itself【小题3】its enemies, as well as to stop flooding【小题4】(effective),” says An Xingzhu, who worked at the town’s culture station for more than three decades. A key task of the station is【小题5】(protect) cultural relics.
In the 1970s,parts of the rammed earth wall(夯土墙)were dug out and used by farmers for their land, but since the early 1990s, the local government【小题6】(start) to take measures to protect the wall.
Rapid development and【小题7】(construct) have brought many new problems and challenges in protecting the wall.【小题8】is necessary to provide a solid legal guarantee for its conservation. To tackle the challenges, Shandong Province has passed a regulation protecting the structure【小题9】will take effect on Jan. 1.
It states that local governments will establish a dynamic conservation system using remote sensing satellites, drones, information platforms and other technological【小题10】(mean) to monitor the Great Wall.