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Unit 4 ore practice 【学习目标】 掌握本重点词汇：invention, convenience, almost, hard, imagine, failure, electric, traffic, lift, electrical 阅读关于电的，进一步了解电在人类生活中的作用，并能结合生活实际谈谈如何节省用电。 【前置作业】用所给词的正确形式填空。 1. Electricity heats food in ovens or cools in ___________ (fridge). 2.Radios and televisions use electricity to bring entertainment and news to ____________ (million) of families. 3. In villages and on farms, _______ (electricity) machines milk the cows and chop their food. 4. In fact, electricitiy finds as ____________ (many ) work to do in villages as it does in cities. 5.When all the electricity was off, the buses and the underground ____________ (stop). 【堂学习】 1. Fill in the blanks. 2. Exercise D in Book A 1)_________________________________________________________________ _____________________________________________________________________2)________________________________________________________________________________________________________________________________________ 3)___________________________________________________________________ _____________________________________________________________________4)________________________________________________________________________________________________________________________________________ 5)________________________________________________________________________________________________________________________________________ 6)___________________________________________________________________ _______________________________________________________________________________ | 
