阅读理解

　　Mr Johnson worked in a hospital．Three years ago, when he was sixty-eight, he retired(退休)．But a lot of people came to ask him to look them over．He was busy in the daytime and he wanted to have a good rest at night．

　　Half a year ago a young man moved in the room upstairs, At first he was quiet．The old man was satisfied with him．Then he had several friends．They often came to see him in the evening．They talked loudly, sang and danced．Mr Johnson was unhappy, but he was a polite man and sometimes he hinted(暗示)to the young man, but the young man seemed that he didn't understand it．The old man could't say anything．

　　It was the young man's birthday yesterday．All his friends came at seven in the evening．They drank too much and made a lot of noise．The old man couldn't fall asleep the whole night．The next morning, as soon as he got up, he went upstairs and began to knock at the door．The young man opened it for him and asked him to go in．

　　“Did you hear me beat the ceiling(天花板)last night, young man?”asked Mr Johnson．

　　“It doesn't matter, sir,”said the young man．“I don't mind it．It was very noisy in my room, too．”

阅读理解

　　Look closely at your hands．Are they clean? It doesn't matter how many times you wash your hands, tiny microbes(微生物)still stay on them．But don't worry．Most microbes don't harm you．

　　Now scientists say the microbes on our hands could be used in a surprising way; fighting crime, According to a recent survey microbes as well as fingerprints(指纹)could be used to indentify the criminal．

　　Everyone has his own set of microbes on the hands．That is to say, if you and your best friend were able to see and compare all the microbes on your hands, your hands probably would look different．Some microbes only show up on your hands while others live only on your friend's hands．

　　When you work on a computer you leave the microbes from your hands on the keyboard．The scientists can easily tell the owner of the keyboard by looking at the microbes on it．Even if you don't leave your fingerprints behind, your microbes may give you away．

　　Noah Fierer, a scientist, says．"You can only clean a fingerprint, but you can't sterilize(使无菌)a surface just by wiping(擦)it off," He says that scientists have a lot more work to do before the microbe is used as a useful tool．