【单选题】—I've never been to a water park. —______ [ ]
【单选题】__________技术把明文元素(字符, 位)映射成密文元素。
【单选题】中秋节吃月饼的民间传说与( ) 起义联系在一起
【单选题】Oh, it’s very cold here, let’s make a fire ____ ourselves up.
【简答题】You may write to me or come to see me. ________ way will do [A] All [B] Both [C] One [D] Either