单选题
He added a ______ to his letter by saying that he would arrive before 8 pm.
A. presidency B. prestige C. postscript D. preliminary
【正确答案】
C
【答案解析】[解析] C选项“postscript附言、后记”符合句意；A选项presidency“任期”；B选项prestige“声望、威望”；D选项preliminary“预备的、初步的”，都不正确。本句空格处意为“他在信中又加了附言”，因此C选项为正确答案。