剧情简介：Gerald is careful. Piggie is not. Piggie cannot help smiling. Gerald can. Gerald worries so that Piggie does not have to. Gerald and Piggie are best friends. In Happy Pig Day! Piggie celebrates her favorite day of the year! But will Gerald the Elephant be included in the festivities? Using vocabulary that is perfect for beginning readers (and vetted by an early-learni...(展开全部)
作者：Mo Willems
出版社：Disney-Hyperion
ISBN：9781423143420
