外语教学与研究出版社
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Unit 1 The Moon
Unit 2 Chinese New Year in Hong Kong
Unit 3 Pollution is Spoiling the Air We Breathe
Unit 4 Man and the Weather
Unit 5 Trip Through Time
Unit 6 The Cash-Free Society
Unit 7 Helen Keller
Unit 8 American English and British English
Unit 9 Homeless People in the USA
Unit 10 Airplanes
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