必修一（Unit4 Earthquakes the 7th period）
TheSeventhPeriod●沉着说课Thisisthelastperiodofthisunit，sotheteacherwilllayemphasisonrevisionandsummary.T
必修一（Unit4 Earthquakes the 7th period）必修一（Unit4 Earthquakes the 7th period）必修一（Unit4 Earthquakes the 7th period）