题目

My father was preparing for his speech __ my mother was doing some washing last night.A．ifB．whileC．unlessD．until 答案：B解析: 略 庄子，即________，战国时________蒙人，________家，________家代表人物。本课两则故事均选自《________》。《庄子》是________的著作集，为________家经典之一。