Unit 3 What Are They? B Listen and Circle CD1 90 仔細聽,將聽到的發音字圈起來。 1 2 lack lick pin pen 3 4 big beg hat hit C Listen and Number CD1 91 仔細聽,將發音字依照聽到的順序編號。 a b c pin pat peg d e f pit pig pen 14