1、廣州牛津初中英語(yǔ)七年級(jí)下冊(cè)課文U2P18JUDY: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?DR RAY:Many things 、 For example,the wood in your pencil,the rubber on the end of your pencil,and the paper in your notebook a

2、ll come from trees 、 Also,do you enjoy fresh air? JUDY: Of course、DR RAY:Well,trees are natural air conditioners 、They cool the air and clean it 、Three trees can do the job of 15 air conditioners 、JUDY:You know a lot about trees,Doctor 、DR RAY:Not really 、 Scientists are only now beginning to unders

3、tand them 、 For example,when insects attack a tree,it can warn the other trees around it 、 Some trees can also join their roots together underground,and pass each other food and water、 Trees are communicating with one another,but we dontknow how 、JUDY: Are trees in danger?DR RAY:Yes,they are in grea

4、t danger 、 We cut down and burn millions every year 、 We are destroying our best pollution fighters 、U3U4ElectricityOne evening,Daisy said, “ I m going to buy some sweets 、 Does anyone want anything? ”Benny,Daisy s brother,said,“ Yes、Can you get me a packet of electricity,please? ”Daisy said, “Right

5、 , ” and went out、Benny laughed, “ I was finally able to fool Daisycantbuy electricity in packets like sweets!She ll look foolish 、”Mum asked , “ What is electricity? ”、 You廣州牛津初中英語(yǔ)七年級(jí)下冊(cè)課文U5U6P82Daisy was in the bathroom 、 She was brushing her teeth and the tap was on、 Water was pouring into the sin

6、k 、“turn that tap off ”a voice said loudly 、 Daisy froze 、 She looked aroud,but saw no one、“youre wasting water ”the voice sounded angry 、Daisy obeyed 、“ wh owho are you?” Daisy asked、“I m water 、It s not easy for me to get here、Twenty-four days ago,I was in a cloud in Yunnan 、Then the cloud dropped

7、 me into a stream and I flowed quickly down the mountain into the Pearl River 、 You know the river ,I hope 、”“Yes,” Daisy answered、“Well ,the river carried me to a reservoir 、I relaxed there for a few days 、Then people cleaned meup、”“Cleaned you up?” Daisy asked、“Yes、 I was dirty after my journey,so

8、 people cleaned me up in a water treatment works、 Then Itravelled in the pipes under the streets 、 I waited there until you called me 、”Daisy said,“ So this is the end of your journey 、”“No 、Then I ll go to a sewage plant 、People there will pump me into the river and I will go backinto the sea again

9、、”“Again? ”“Yes、I came from it in the first place 、Remember not to waste or pollute me 、Im valuable,like liquid gold 、 See you、 ”Daisy came out of the bathroom 、Her brother Benny said,“ I heard voices in there 、Who were you talking to? ”“ The water,” Daisy said、Benny shook his head、“ Sometimes youre

10、 really strange,Daisy 、” he said、水的 “I m water 、It s not easy for me to get here、Twenty-four days ago,I was in a cloud in Yunnan 、Then the cloud dropped me into a stream and I flowed quickly down the mountain into the Pearl River 、 You know the river ,I hope 、”“ Well ,the river carried me to a reser

11、voir 、I relaxed there for a few days 、 Then people cleanedme up、”“ Yes、I was dirty after my journey,so people cleaned me up in a water treatment workstravelled in the pipes under the streets 、 I waited there until you called me 、”、Then I廣州牛津初中英語(yǔ)七年級(jí)下冊(cè)課文“ No 、 Then I ll go to a sewage plant 、 People there will pump me