Edison had quick mind about inventions, but not always about other things.

    One day he received a notice. It said he must pay some money to the government by the next day. If he was late, {#blank#}1{#/blank#}. Edison went to the city office. Many people were waiting there in line to pay. {#blank#}2{#/blank#}, his mind was busy with ideas about a new invention. {#blank#}3{#/blank#}, the man behind it said to Edison “Young man, what's your name?”

    Edison looked at the man in surprise. “ I don't know,” he said.

    “Then I can't help you,” the man said, and told him to leave.

    Other people paid the money, but Edison stood there, and tried to remember his name. The day ended, {#blank#}4{#/blank#}.

    In the street, {#blank#}5{#/blank#}. He had to ask the friend what his name was.

A. When you're with friends on bikes, it's much safer to ride behind, not next to each other. Where one road meets another, you should take even more care. Slow down and check both roads.

B. If you have an accident or fall off your bike, a helmet will protect your head. It must be the right size.

C. Many children have accidents when they listen to the music while riding. It's important to hear everyone else on the road.

D. Before you even set out, it is important to ensure that your bike is roadworthy（适于行驶的）and safe. Do all the parts work properly?Is there enough air in your tyres（轮胎）?

E. Cycling at night can be really dangerous. Go slower than you would in the daytime.

F. Red traffic lights aren't only for cars and buses. They're for you too if you're on a bike.

    Summer is here. One of the best ways to cool off on a hot summer day is to jump into a swimming pool. Swimming is great exercise, and a trip to a pool or beach is a good way to have fun with friends. {#blank#}1{#/blank#}, so it's important to stay safe as you do it. Here are a few things you can do to swim safely.

    ●Swim only in areas set for swimming.

    Don't swim unless there is a lifeguard (救生员) on duty. If you're on a beach near the ocean, this is especially important. In some places, fast currents (急流) can sweep swimmers away without warning. So if a sign says "no swimming", please take care.

    Be careful when diving (跳水) into the water headfirst.

    Most pools have deep ends where diving is safe. In natural water, don't dive unless you know that the water is deep enough. {#blank#}2{#/blank#}, causing injury (伤害) or death.

    ●Make sure you have a partner with you.

    Nobody knows what will happen while you are swimming. If something goes wrong, you can get help from that person as soon as possible. In this situation, {#blank#}3{#/blank#}.

    ●Pay close attention to children's safety.

    Kids who don't know how to swim should wear life jackets. But by themselves they are not enough, {#blank#}4{#/blank#}. If you have a pool at home, put a fence (围栏) around it in case children fall in. And if a child disappears, check the pool first.

    When we watch movies about the future，we sometimes see robots. ⑴Some robots are very human-like. ⑵它们能像人一样走路和跳舞。Some scientists think that in the future they will make robots more like humans. However, some scientists think although we can make robots move like people, it will be difficult to make them really think like a human. For example, scientist James White thinks that ⑶robots will never be able to wake up and Know where they are. ⑷但是许多科学家不赞同怀特先生。They think that robots will even be able to talk like humans in 25 to 50 years. ⑸We never know what will happen in the future.

⑴{#blank#}1{#/blank#} ⑵{#blank#}2{#/blank#} ⑶{#blank#}3{#/blank#} ⑷{#blank#}4{#/blank#} ⑸{#blank#}5{#/blank#} 

    Samuel Langhorne Clemens was born in 1835, in the state of Missouri. When he was four, his family moved to the town of Hannibal, Missouri. Hannibal was a port on the Missippi River, and Clemens loved to watch the big steamboats going up and down the river. He said that all the boys in his school had one ambition in life: to work on a steamboat!

    His father died when he was just 12 years old, and Clemens then went to work for a printer to help support his family. He travelled around, and worked in many different cities. But when he was 22, he achieved his ambition—he got a job working on a steamboat. He sailed up and down the wide Missippi River until the American Civil War began.

    He then moved around America, and tried several jobs. He was a soldier, and a silver miner. Then he started working as a writer for a newspaper. It was at that time that he decided to use a pen name for his stories, and he chose the name "Mark Twain".

    The name is interesting. It comes from his days on the steamboats. He used to throw a piece of rope into the river. There was a heavy weight on the end of the rope, and the rope had some marks on it. He used the rope to find how deep the river was. Then he shouted out, "Mark One" or "Mark Twain", meaning "Mark Two". Each mark was about two metres, so when he shouted "Mark Twain", it meant that the river was deep enough for the big boat.

    In 1865 Clemens wrote a story about a jumping frog. The story and the writer became famous. In 1867 he toured Europe. He married when he returned, and lived for most of the rest of his in Harfort, Connecticut. He wrote many books, including The Adventures of Tom Sawyer, which he wrote in 1876. He also gave many lectures, and became a very famous and popular man.

    Once two of his friends decided to write to him, but they had lost his address. So on the envelope they just wrote "Mark Twain, God knows where". Several weeks later, they received a replay from the writer. It just said, "He does!"

    Samuel Clemens died in 1910. He is considered to be one of America's most important writers.