阅读理解The largest-ever chariot pit (战车坑)of relics with carts and horse bones has been discovered in Henan Province. It may lead to the uncovering of chariot pit groups that could be a key to understanding Chinese civilizations that existed more than 2,000years ago.Experts said the relics are dated more than 300 years earlier than the famous warriors in Shaanxi Province. What excited the experts were two other projects that located two huge pits with similar features.