约410字。
　　Unit 3 Back to the Past
　　Reading ---Lost Civilizations
　　Teaching Aims:
　　1) To talt lost civilizations
　　2) To help the students develop the ability of reading diary entries.
　　Important and difficult points:
　　The way of reading diary entries.
　　Teaching procedures:
　　Step1 Lead-in
　　In the past thousands of years,people have built many magnificent structures around the world. China has a long history. Can you name some buildings that could represent ancient China civilization in China?
　　The Great Wall, the Summer Palace,
　　the Temple of heaven
　　The thirteen tombs of the Ming Dynasty,
　　the Confucius temple,
　　Royal Gardens of Suzhou
　　Show Ss some pictures about china’s civilizations.
　　Questions: Are you familiar with these famous Chinese historic sites ?
　　• The ruins of Yuanmingyuan are located in the suburbs of Beijing to the north-west of Qinghua Universty. Yuanmingyuan dates back to the