Unit 1 How tall are you? The First Period The Second Period The Third Period The Fourth Period The Fifth Period The Sixth Period Unit 2 Last weekend The First Period The Second Period The Third Period The Fourth Period The Fifth Period The Sixth Period Unit 3 Where did you go? The First Period The Second Period The Third Period The Fourth Period The Fifth Period The Sixth Period Unit 4 Then and now The First Period The Second Period The Third Period The Fourth Period The Fifth Period The Sixth Period Recycle The First Period The Second Period The Third Period The Fourth Period