Answer Key UNIT 1 10 Write the missing letters and match. 10 1 1 2 2 3 3 4 4 5 5 6 6 7 7 a a P P G G U U N N b b E E A A c c P P N N d d H H I I P P N N E E EE e e C C H H E E f f K K N N A A g g O O L L L L A A 20