Unit 1 A New Man Short a
Unit 2 Friends Are the Best Short e
Unit 3 Wicked Widow Short i
Unit 4 Stop the Spots! Short o
Unit 5 Just in Time Short u
Unit 6 Save the Day！ Long a
Unit 7 Free the Cheetahs Long e
Unit 8 Mighty Nightmares Long i
Unit 9 Smoke Show Long o
Unit 10 Test Tube Truth Long u
参考译文和答案
