P5 2-1 I. 含Short Ii的单词 I. 含Short Ii的单词 P6 2-2 II. 含Short Oo的单词 II. 含Short Oo的单词 P6 2-3 III. 含Short Uu的单词 III. 含Short Uu的单词 P6 2-4 IV. 奇想法 IV. 奇想法 P7 2-5 I. Listen and tick. I. Listen and tick.