P2 1-1 I. 含Short Aa的单词 I. 含Short Aa的单词 P3 1-2 II. 含Short Ee的单词 II. 含Short Ee的单词 P3 1-3 III. 奇想法 III. 奇想法 P4 1-4 I. Listen and number. I. Listen and number.