学进去

Several large wooden constructions 1． ( date) back to the Neolithic era（新石器时代) were unearthed at the Jijiaocheng ruins site, a prehistoric cultural site located in Changde City, central China's Hunan Province.

First discovered in 1978,the site used 2． ( be) a city from the Qujialing culture period (3300 BC-2600 BC) - a Neolithic civilization, 3． had roots in the middle and upper reaches of the Yangtze River primarily 4． (find) in today's Hunan and Hubei provinces.

Researchers 5． (conduct) three excavations(挖掘)at the southwestern part of the city wall since 2020. More than 30 housing sites were discovered at the 721 -square-meter area, 6． a number of wooden architectural relics unearthed that were built 4,800 years ago. Researchers think they are the most complete and 7． (early) wooden structure building foundation in China. Besides, remains of rice husks (外壳) were also found at the site, covering 8． area of 80 square meters.

Researchers believe 9． ( strong) the new findings will enrich the architectural history of prehistoric China. " The 10． ( discover) helps us understand the overall architectural style of the Yangtze River Basin," said Zhao Hui, a professor at Peking University School of Archaeology and Museology.