Welcome to this short tour of London from Trafalgar Square．Now we are standing{#blank#}1{#/blank#}from the National Galley,a museum with a lot of famous{#blank#}2{#/blank#}．We'll walk along the red street to Buckingham Palace，the Queen's home．Opposite Big Ben is the London Eye．In it，you can see most of London on a(n){#blank#}3{#/blank#}day．The best way{#blank#}4{#/blank#}London is to take a boat tour along the River Thames．You can get off the boat at Tower Bridge．Next to it is the Tower of London，over nine{#blank#}5{#/blank#}years old．After visiting it，let's go back to the square to finish our trip．

    On March 14, maths and science lovers around the world celebrated a special day: Pi Day.

    Pi is{#blank#}1{#/blank#} to3. 14, but the number goes on endlessly. It is sometimes written in Greek,π. With the help of computers, mathematicians have been able to {#blank#}2{#/blank#} pi out to over trillion (万亿) decimal places, but there is still no{#blank#}3{#/blank#} to the number. This makes pi puzzling, even for the most famous scientists and mathematicians.

    Pi Day is celebrated around the world on March 14, since how we write this date, 3/14,looks just like the number pi.

    For some people, the appeal (吸引力) of Pi Day goes far beyond maths and science. Pi shows up{#blank#}4{#/blank#}popular culture. You can see it in movies, comics, music and more. "In modern movies, any time the filmmaker wants to evoke (产生) a sense of mystery, often the symbol pi is used, "says David Blatner, Jewish American writer of The Joy of Pi.

    When I was waiting for a bus at a station. I saw a young man get into a telephone box near the station. After a short time, he came out and {#blank#}1{#/blank#}very sad. As he saw me, he came over".

    "Good afternoon, sir," he said. "When was Abraham Lincoln born, do you know?"

    I felt a little{#blank#}2{#/blank#}at his words. "Something may be wrong with him," I thought. Then he asked{#blank#}3{#/blank#}and I could see that he was not joking. So I thought for a minute and{#blank#}4{#/blank#}him that Abraham Lincoln was born in 1809.

    The young man walked into the telephone box again. A few minutes later, he came out{#blank#}5{#/blank#}. He thanked me and told me that he wanted to make a telephone call to his friend but he{#blank#}6{#/blank#}his telephone number.

    "You{#blank#}7{#/blank#}me remember it," he said. "His telephone number is '180909', and you can remember it easily if you know when the great man was born."

    The British Museum is the biggest one in the world. Inside, you feel smaller than usual. There are about a hundred things in the museum to see: {#blank#}1{#/blank#} which have been telling the time for six hundred years, Roman money, some of the earliest books in the world, including Shakespeare's own works…

    The British Museum was set up nearly 300 years ago by a doctor, Sir Hans Sloane. The man liked to {#blank#}2{#/blank#} such things as books, drawings, clothes, money, animals, flowers, and also hoped that his things would be well {#blank#}3{#/blank#}  and so visited by people after his death.

    His wish came true, and the museum opened in 1759, six years after Sir Hans Sloane died.

    Later, more antiques(古董) arrived at the museum, more books, old and new, came to it, and more people wanted to visit it. The museum had a famous round Reading Room. There was {#blank#}4{#/blank#}  unusual in the room. Cool air came up {#blank#}5{#/blank#} small holes in the tables. Hot air flowing under the floor kept readers' feet {#blank#}6{#/blank#}. Since its opening, many famous men have written and studied there, like Karl Marx. And the library is growing faster and faster--there are four kilometers of new shelves each year,{#blank#}7{#/blank#} it attracts increasing number of tourists each year.

    It is now open every day of the year, except for two holidays (New Year's Day and Christmas). Entrance (入场) is free. There are lots of special exhibitions and every day there are different films and talks, some of {#blank#}8{#/blank#}for children. Small machines tell you about the museum and as you walk around it, you can look and listen at the same time. So if you are one of the British Museum's two {#blank#}9{#/blank#} visitors this year, don't try to see it all too {#blank#}10{#/blank#} . There is a lifetime of looking in the British Museum.