—He is polite and friendly. 

提示:北京动物园在北京西城区（Xicheng District），每天 7:30 开馆；园内大约有 15,000 只动物，有来自南非的狮子、澳大利亚的树袋熊、中国的大熊猫等；每年大约有 600 万名游客到此参观。

要求:语句通顺，语意连贯，无语法错误；60 词左右。

Peter and Lisa are going to the sports hall.  They want to watch a football match.  They1 the bus and get off at Sunflower Road Stop.  They don 't know2 to get to the sports hall,  3 they ask an old man for help.  

"Excuse4 , Grandpa.  We want to go to the sports hall.  Can you tell us the5 ?"Peter asks.  

"Certainly.  Go along Sunflower Road and6 right into Maple Street.  The sports hall is 7  opposite the second bus stop.  It 's not very far.  You will8 it, " says the old man.  

The two kids9 the old man and walk to the sports hall.  They finally get there.  The10 will start in five minutes.  They are so lucky.  

It 's a hot summer and there is no rain. A crow (乌鸦) lives.  in a big tree near a village.  He has no parents or friends.  One day, he feels very thirsty. "Oh, I must find some water! I am too thirsty.  Where can I find water? "

The crow flies to a house in the village.  Outside the house, he sees a vase (花瓶) with some water.  However, there is only a little bit of water.  So he can't drink it.  

The crow doesn't know what to do. He begins to cry,  "Who can help me? I need help! " He cries and cries, but no one hears him.  He is tired and he wants to do something.  The crow tries to put the vase down, but he is not strong enough to do that.  Then, he has a good idea.  He goes to find some little stones.  He comes back and puts the stones into the vase.  At last, the crow can drink the water! 

"What nice water!" says the crow. "I am happy I do not waste (浪费) all my time crying." 

He is a clever crow.  We all know the name of the story is The Crow Drinking Water.  We like the story.  It tells us when we are in trouble, we should think it over and try our best to solve it.  

     Scientists are always trying to find new green energy. Now, some scientists in Sweden have found one: the heat from our own bodies. They are putting together the heat that our bodies give off naturally, and using it to heat buildings.

    In general, the temperature of the human body is about 36.8C and we are always giving off some heat because our bodies are usually much warmer than our environments around us. When many people get together, they can produce a lot of heat.

     About 250,000 people pass through Stockholm Central Station each day.' Their bodies produce a lot of warm air. Usually, ventilator fans(换气扇) would guide this warm air to the outside of the station and it would be lost. But the Swedish scientists are using a piece of equipment to catch the warm air and guide it to heat underground water tanks (水箱). The warmed water from these tanks makes heat enter an office building about 60 metres away. As a result, the building's energy costs are down by 20%.

    There are problems, of course. “It's very hard to move low-temperature heat very far," says Lester Lane of Carnegie Melon University. "You must be careful," he says," not to use more energy than you save when passing on the warmed water to another place.

     The Swedish scientists say that, however, this is not a big problem and, after. all， they want to use body heat more to heat homes and other buildings. This would make energy cheaper and the environment better.