Unit 4 Amazing ScienceTopic2 When was it invented?Section A备课人:Jenny 课时:第1课时 时间:2012.12.17All things are difficult before they are easy. 万事开头难。学习目标:1.学习一般过去时的被动语态(1)学习be made of 和be made from 的区别。(2)学习句型When/Where was it developed? 2.学习表达希望和祝愿的句型。 3.谈论新科技及发明。学习过程:一、根据1a,找出以下问题的答案。1. Why is Jane unhappy?_2.What is a rocket used for?_ 二、划出以下句子并背诵。