It was the ambition of an eleven years old boy in Kansas City to be an engine driver. Born without arms, he had been sent to special schools {#blank#}1{#/blank#} he learned to use his {#blank#}2{#/blank#} (foot) as “hands”. He spend all his spare time {#blank#}3{#/blank#} (watch) trains and one day his dream came {#blank#}4{#/blank#} (truth). Seeing a deserted engine, the boy climbed in, he had no {#blank#}5{#/blank#} (difficult) in starting it up with his feet. Soon he was traveling along {#blank#}6{#/blank#} forty miles an hour. Signalmen could not see the young driver, so they set out {#blank#}7{#/blank#}(stop) the train. Meanwhile the boy reached Missouri, stopped the engine himself, and then {#blank#}8{#/blank#}(make) it go backwards. When he was near home, a railwayman caught up with the engine and stopped it. At first, he was very angry, but he smiled when the boy said {#blank#}9{#/blank#} (simple), “I like trains.” “Well, I'm glad you don't like planes!” answered {#blank#}10{#/blank#} railwayman.

    Just How Buggy is Your Phone?

    What item in your home crawls with the most germs? If you say {#blank#}1{#/blank#} toilet seat, you're wrong. Kitchen sponges top the list. But cell phones are pretty dirty too. They contain around 10 times as many germs as toilet seats. People touch their phones, laptops, and other digital devices all day long, yet rarely clean them.

    In one incident, a thief paid a terrible price for stealing a germy cell phone. He stole it from a hospital in Uganda during a widespread of the deadly disease Ebola. The phone's owner reported the theft before {#blank#}2{#/blank#}(die)from the disease. Soon, the thief began showing symptoms and finally {#blank#}3{#/blank#}(confess)to the crime.

    {#blank#}4{#/blank#} in that unusual case a cell phone carried dangerous bacteria, not all germs are bad. Most cause no harm. In fact, they could provide helpful information. Look at the surface of your phone carefully. Do you see some dirty mars? “That's all you,” says microbial ecologist Jarrad Hampton-Marcell. “That's biological information.”

    It turns out that the types of germs that you apply all over your phone or tablet are different from {#blank#}5{#/blank#} of your friends and family. They're like a fingerprint that could identify you. Some day in the future, investigators may use these microbial fingerprints to solve crimes. Phones and digital devices may be one of the best places to look for buggy clues.

    In a 2017 study, researchers sampled a range of surfaces in 22 participants' homes, {#blank#}6{#/blank#} countertops and floors to computer keyboards and mice. Then they tried to match the microbial fingerprints on each object to its owner. The office equipment was easiest to match to its owner. In an {#blank#}7{#/blank#}(early)study, a different group of researchers found that they could use microbial fingerprints to identify the person who {#blank#}8{#/blank#}(use)a computer keyboard even after the keyboard sat untouched for two weeks at room temperature.

    One day, microbial signatures might show {#blank#}9{#/blank#} people have gone and what they have touched. They could prove {#blank#}10{#/blank#} an unmarked device is yours. So, sure, your phone is pretty germy. Does that inspire you, or does it just bother you?

    There are four ways {#blank#}1{#/blank#}which British and American English differ from each other. The first and most obvious way is in the vocabulary. There are a few {#blank#}2{#/blank#}(differ) in grammar, too. The British say Have you got…? {#blank#}3{#/blank#}Americans prefer Do you have…? The British use prepositions {#blank#}4{#/blank#}Americans sometimes omit them. The other two areas in which the two varieties are different are spelling and {#blank#}5{#/blank#}(pronounce). However, with communications {#blank#}6{#/blank#}(develop) {#blank#}7{#/blank#}(steady) for over a century, some experts believe that the two varieties {#blank#}8{#/blank#}(move) closer together due to satellite TV and the Internet. English {#blank#}9{#/blank#}(speak) with different accents; in the future, there are going to be many "Englishes". In spite of this, users of English will have no difficulty {#blank#}10{#/blank#}(understand) each other.