51talktextbook.51talk.com/.../l5_201611171353.pdf51talk american academy g4 - unit 1 - lesson 5 you...

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  • lv4 U1 L5-lv4 U1 L5-2lv4 U1 L5-3lv4 U1 L5-4lv4 U1 L5-5lv4 U1 L5-6lv4 U1 L5-7lv4 U1 L5-8lv4 U1 L5-9lv4 U1 L5-10