题目

祖国大陆获得统一，各族人民实现大团结的标志性事件是（ ） A . 西藏和平解放 B . 解放战争的胜利结束 C . 土地改革完成 D . 中华人民共和国成立 答案：A Nobody believed his reason for being absent from the class _________ he had to meet his uncle at the airport． [　　] A．why B．that C．where D．because