广州牛津初中英语七年级下册课文

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?

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 all 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 understand 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 don’t know how.

JUDY：Are trees in danger?

DR RAY：Yes,they are in great danger.We cut down and burn millions every year.We are destroying our best pollution fighters.

U3

U4 Electricity

One 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 ,”and went out.Benny laughed,“I was finally able to fool Daisy.You can’t buy electricity in packets like sweets!She’ll look foolish.”

Mum asked ,“What is electricity?”

U5

U6

P82

Daisy was in the bathroom.She was brushing her teeth and the tap was on.

Water was pouring into the sink.

“turn that tap off ”a voice said loudly.Daisy froze.She looked aroud,but saw no one.

“you’re wasting water”the voice sounded angry.

Daisy obeyed.“wh o…who 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 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 me up.”

“Cleaned you up?”Daisy asked.

“Yes.I was dirty after my journey,so people cleaned me up in a water treatment works.Then I travelled 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 back into the sea again.”

“Again?”

“Yes.I came from it in the first place.Remember not to waste or pollute me.I’m 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 you’re really strange,Daisy.”he said.

水的经历图

“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 reservoir.I relaxed there for a few days.Then people cleaned me up.”

“Yes.I was dirty after my journey,so people cleaned me up in a water treatment works.Then I travelled in the pipes under the streets.I waited there until you called me.”