UNIT FIVE I CAN SING Hello! Boys and girls! see-saw see-saw see-saw Paul Shipton 著 Brett Hudson 绘 The hippo went down. The monkey went up. The monkey went up. The hippo went down. The crocodile went up. The crocodile went up. The monkey went up. The lion went up. The mouse went up. A. B. C. The hippo went up. The mouse went down. A. B. C. The hippo went down. The End
