Rose was born on February 29th, 2004. By 2010, her parents had 6 birthday parties for her. But most(大多数) of them were on February 28th. One day, she knew that only February 29th was her real (真实的) birthday. It comes every four years, so she didn;t want to have birthday parties on February 28th any more. After that, she had only one party. That was in the year 2012. On that day her grandparents, all her uncles, aunts and cousins came to her home to celebrate her birthday. She got so many presents. She thinks it's much more interesting to have a birthday party every four years.

    March 20th is World Water Day every year. According to a report from the United Nations, more than half of the world's major rivers have serious water loss and are polluted.

    The Yellow River, the world's fifth longest river, watered some of the oldest farms on earth. {#blank#}1{#/blank#}Its source（源头）on Qinghai-Tibet Plateau is drying up. In most of the past 35 years, it didn't reach the sea.

The Nile in Egypt, running 6, 650 km, is the longest river in the world. {#blank#}2{#/blank#}Now it is down to 2 billion m³ or so. Australia's Murray River reaches the sea only every other year. One fifth of America's Rio Grande has no water, either.

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    Mostly it's damming（筑坝）and global warming that make rivers dry. {#blank#}4{#/blank#}Now about 45, 000 of them lie across the world's rivers. They hold back around 15% of the world's fresh water from running to the sea.

{#blank#}5{#/blank#} Warmer weather takes water away. The glacier（冰川）are becoming smaller. The source of the Yellow River is drying up because of it. Global warming has had certain effects on water sources. Droughts happening around the world make people pay more attention to this fact.

    The school trip is useful. It is one of the ways for students to be in the real life. But sometimes, it may not be good as you think.

    We had a terrible school trip yesterday. Some students were late for the early bus. Then we had to wait for the next bus. We waited for a long time but it didn't arrive. In the end. Our teacher took us to take the subway. 花了我们大约一个小时。 After we got off the subway, we walked and got lost. When we finally arrived at the zoo just at noon. We were tired and hungry. We wanted to see pandas, but there weren't any. There were some really smart elephants, but we didn't see the show because we arrived too late. We left our cameras (照相机)at school, so we didn't take any photos. Then it rained，and no one had an umbrella. We went for lunch. But there wasn't any restaurant in the zoo. My friends had some ice-cream. But I didn't have any, because I don't like it. We didn't see many animals because of the rain. We left the zoo at 5 p.m. when the rain stops. At last, we went back to school. We were really tired. I didn't enjoy my school trip at all.

    The villas(别墅)were very nice. Beautiful houses, wonderful lawns, and nice gardens. This was the kind of housing estate where John Wood preferred to work.

    It was just before eleven o'clock at night. After John drove around for the fifth time, he thought that he had found the right house-No. 4. There was no light and the garage(车库)door was open. John parked his car in the next street and then came into the garage.

    No one would think that a well-dressed gentleman with a white silk scarf and gloves, was really an excellent thief.

    After looking around the house for a while, John got down to work. He searched every room, and before long, his hands were full. He had two necklaces, some gold rings and a purse with a lot of money. He put all the things in his pocket.

    Then he found a small wall safe(保险箱)in the bedroom. John couldn't wait to take the valuable things from the safe and put them into his own pocket！But the thief met a problem; he couldn't open the safe.

    John wiped a few drops of sweat from his forehead, took off his gloves, and placed them on a chair. Again and again, and finally, he opened the safe. He saw something shining-a huge diamond.

    Suddenly, John heard someone opening the front door. It was the owner of the house. John put the diamond in his pocket, ran to the window, climbed out of the house and drove away in the dark.

    Ten minutes later, the police arrived. After searching the house. the police found an important piece of evidence(证据)that could easily tell who was the thief.

    Do you know what the piece of evidence was?