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1、Unit 4 Topic 2 When was it invented 【学习目标】1.复习一般过去时的被动语态；2.了解全球定位系统。【预习案】一、 根据1a，回答1b的问题。 二、 在文中找到并划出下面的短语1.探索我们的世界_ 2.很久以前_ _ 3.早期的探险者_4.天上的星星_5.在哪个方向_6.(方法)可行_7.在夜间_8.只要_9.在其余时间里_10.一颗人造卫星_ _11.在任何时间_ _ 12.在任何地点_13.在任何天气下_14.找到我们的位置_ _15.地球的形状_16.(某人)迷路_17.迅速地逃掉_ 18.从某人那里偷走某物_ 19.藏在一个隐秘的地方 _20.令他吃
2、惊的是 _ _ _21.被警察抓住 _【探究案】 在文中划出下面的句子并分析1.This method worked well at night as long as the weather was good and the stars could be seen.译：_ _ 点拨：work well - (方法)可行, (物品)正常工作 拓展：(衣物)好洗_ (货物)好卖_ (机器)运转正常_点拨：as long as = so long as - 只要(引导条件状语从句)练习：a.只要你们有足够的钱，就有机会到国外度假。Youll have _ _ _ _ _ for a holiday
3、_ _ _ your money is _. b.只要我们有票，我们就去参加音乐会。We can go to the _ _ _ _ we have tickets.2.GPSis a great invention that helps us explore our planet and discover where we are. 译：_ _思考：句子中that引导了一个_从句；where引导了一个_从句练习：a. She gave us a good method that improved our English in a short time.译：_ _b. None of them knew where they were or what they were doing.译：_ _
