【正文】
Unit 6 When was it invented? Section B, 1a1e amp。 Self Check 一、 Teaching Aims: learn and to use new words crispy sour by mistake customer be able to use the passive voice of past tense 二 、 Teaching key points: (1) sentences: the passive voice of past tense Eg. It was invented by a great man. (2) new words and phrases: crispy sour by mistake customer 三、 Teaching difficult points: ★ sentences: the passive voice of past tense Eg. It was invented by a great man. 四、 Teaching Aids: 1. a tape recorder 2. the blackboard 3. a puter with PowerPoint 五、 the first period (for on