Unit 1 : Aa, Bb / apple, banana / Hi, Mina! Hello! I am tony.
Unit 2 : Cc, Dd / cat, duck / Sorry! That's okay.
Unit 3 : Ee, Ff / ear, fish / Thank you. You're welcome.
Unit 4 : Gg, Hh / girl, hat / Milk, please. Here you are.