Unit 6 When was it invented?
The First Period Section A 1a–2c
Teaching aims（教学目标）
一、通过学习，熟练掌握以下词汇：style, project, pleasure, menti on
二、通过问答，掌握以下句型：
1. A: When was the telephone invented?
B: I think it was invented in 1876.
2. A: What are they used for?
B: They’re used for seeing in the dark.
三、1.正确运用被动语态谈论重要的发明的历史和用途。
2.掌握一般过去时态的被动语态, 由 was/were +过去分词构成。学会单词invent, 以及be used for 的用法
