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Unit 8: It's hot today - Lession 2
http://www.youtube.com/watch?v=hiAcrQOG6yg
Unit 8: It's hot today - Lession 3
https://www.youtube.com/watch?v=xPgv2vKQ0y4
Unit 8: It's hot today - Lession 4
https://www.youtube.com/watch?v=f0YgmXa37K0
Unit 8: It's hot today - Lession 5
https://www.youtube.com/watch?v=cjXqkAha5mk