1、 Lesson 26Keep the Candle BurningDo you think science is interesting?Why or why not?Name one or two famous Chinese scientists.What do you know about them?Think About It!What do we need to do the experiment?a candle a candle holderhold +er =holderv.+er=n.a candle holderhold +er =holderv.+er=n.a candl
2、e holderhold +er =holderv.+er=n.a big glass jara shallow dish with watera shallow dish with waterlight+er=lighterv.+er=n.a lightermatchesmatch n.火柴/比赛v.相称；匹配How to do the experiment?burn burned/burnt burned/burntlight lighted/lit lighted/lithalf full 一半满/二分之一满make/let/have sth./sb.do sth.“使某物/某人做某事”
3、to make the candle burn=light the candleTalk aboutWhat makes the candle burn?Oxygen 氧气Why did the candle stop burning?Is there any oxygen in the jar?use up “用完，用光”=run out（主语物）/run out of（主语人）eat up drink up How far does the water rise?Why?one fifth“五分之一”be made up of “由组成”Can you read？1/51/21/31/43
4、/4one fiftha(one)half one second(one-second)one thirda(one)quarter one fourththree fourths three quarters分子基，分母序，分子 1,分母加 SExercises1.The water here is s_,not deep.2.Let the fire b_ for a few hours.The room will be very warm.3.Look!The boy is playing with some _(火柴).4.There is little _(氧气)at the top
5、 of the mountains.5.Mr.Black sat down and _(点燃)a candle.I.根据首字母或汉语提示，完成下列句子。lit/lighted hallow urnmatchesoxygen1.当蜡烛停止燃烧时，它已用光了空气中所有的氧气。When the candle _ _,it _ _ _ all the oxygen in the air.2.我们班里五分之三是女生。_ of the studentsin our class are girls.4.为了完成那项工作，他工作了十个小时。_ _ the work,he has worked _ ten hours.II.根据汉语提示填空，每空一词。stops burning hasused upThree-fifthsTo finish forIII.根据汉语翻译句子。1.他把汤匙放到了碗里面。2.Lily 把瓶子装了一半的水。3.他让我们把这首歌唱了一遍又一遍。4.请把罐子放到蜡烛的上面。5.我妈妈昨天买衣服花光了她身上所有的钱。6.中国约1/2的水源受到污染。7.世界由七大洲和四大洋组成。Do It YourselfFirst,.Second,.Third,.Finally,.
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