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Unit 4 Lets Go and Play!,Lesson 21 Green Light. Go!,Lets learn!,These are traffic lights.,Its a green light, lets go.,Its a red light, lets stop.,Its a yellow light, lets wait.,Go, its a green light.,Stop, its a red light.,Wait, its a yellow light.,Dont go when the light turn red.,Dont go when the light turn yellow.,Go when the light turn green.,Dont play on the street!,Lets talk!,Talk what we should do or dont on the street.,Write down the new letters on the book, each for three times.,Homework,Thank You!,
