单击此处编辑母版标题样式单击此处编辑母版文本样式第二级第三级第四级第五级Unit 9When was it inventedSection B柯群青salty:in the end:by mistake:by accident:according to:咸的含盐的. 名词salty 加 y 构成形容词． 最后终于. eg. Everything will be

Click to edit Master title styleClick to edit Master text stylesSecond levelThird levelFourth levelFifth levelTelevisionnew shows beginning last weekNovelty StagePhilo FarnsworthPatents Dissector Tube

单击此处编辑母版标题样式单击此处编辑母版文本样式第二级第三级第四级第五级Unit 7 A man who never gave upLesson 25Invention on penListen and answerWhat does David want to do Why he want to do itRepeat and PractiseTINA:What are you doingDAV