广州牛津初中英语初中七年级的下册的课文.docx

U2 P18 JUDY： Why are you so interested in trees,Doctor Ray? DR RAY： They’ re the biggest and oldest living things on Earth,Judy. JUDY： But what are they useful for? DRRAY：Many example,the wood in your pencil,the rubber on the end of your pencil,and the paper in your notebook all come from ,do you enjoy fresh air? JUDY： Of course. DR RAY： Well,trees are natural air cool the air and clean trees can do the job of 15 air conditioners. JUDY： You know a lot about trees,Doctor. DR RAY： Not are only now beginning to understand example,when insects attack a tree,it can warn the other trees around trees can also join their roots together underground,and pass each other food and are communicating with one another,but we don ’ t know how. JUDY： Are trees in danger? DR RAY： Yes,they are in great cut down and burn millions every are destroying our best pollution fighters. U3 U4 Electricity One evening,Daisy said, “ I ’ m going to buy some anyone want anything? Benny,Daisy ’ s brother,said, “ you get me a packet of electricity,please? Daisy said, “ Right , ” and went laughed, “ I was finally able to fool can buy electricity in packets like sweets!She ’ ll look foolish. ”  ”  ” ’ t Mum asked ,  “ What is electricity?  ” U5 U6 P82 Daisy was in the was brushing her teeth and the tap was on. Water was pouring into the sink. “turn that tap off ” a voice said looked aroud,but saw no one. “you ’ re wasting water ”the voice sounded angry. Daisy obeyed. “ who? who are you? ”Daisy asked. “I ’ m water .It ’s not easy for me to get days ago,I was in a cloud in the cloud dropped me into a stream and I flowed quickly down the mountain into the Pearl know the river ,I hope. ” “Yes, ” Daisy answered. “Well ,the river carried me to a relaxed there for a few people cleaned me up. ” “Cleaned you up? ” Daisy asked. “ was dirty after my journey,so people cleaned me up in a water treatment I travelled in the pipes under the waited there until you called me. ” Daisy said, “ So thi