Unit4Whenwasitinvented
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Unit 4 When was it invented?（精选5篇） unit 9 when was it invented?学习目标：1.学会使用含有被动语态的不同句型结构“when/ where was it invented?” 和“what are they used for?--- they are used for doing sth..”来谈论各种发明物的历史。 2.学习理解被动语态的含义。
Unit 4 When was it invented?（精选5篇） unit 9 when was it invented?学习目标：1.学会使用含有被动语态的不同句型结构“when/ where was it invented?” 和“what are they used for?--- they are used for doing sth..”来谈论各种发明物的历史。 2.学习理解被动语态的含义。