A:栖惶/栖息 椽子/置喙 跂望/分歧 槲寄生/流觞曲水
B:殒命/陨落 叨光/韬晦 祚薄/愧怍 缟素/形容枯槁
C:莆田/江浦 修茸/修楔 堤坝/提防 烟囱/忧心忡忡
D:湍急/遄往 谰言/斑斓 栈桥/饯别 冒昧/联袂而往
—Where's Sam?
—He _______ for a test in his room.