Vienna is a beautiful old city on the River Danube in the center of Europe. It's the capital city of Austria and the center of European classical music. In the 18th century a lot of musicians came to study and work in Vienna.

    In the Strauss family, there were two composers called Johann Strauss: the father and the son. The father, Johann Strauss the elder, wrote and played music for traditional dances, called the waltz. His dance music made him famous all over Europe. The son, Johann Strauss the younger, was also very successful and popular. He wrote over 150 waltzes. In 1867 he wrote The Blue Danube waltz.

    Mozart was another very important composer. He was born in Austria in 1756. Before he was six, he played not only the piano but also the violin. His family took him around Europe and he gave concerts in many cities. He wrote hundreds of wonderful pieces of music. But he became very poor and died in 1791 when he was only 35. Like Johann Strauss, father and son, he was a great European musician, and many people still think his music is perfect.

There is a 3D-printed library in our community (社区) . It was printed out in three {#blank#}1{#/blank#}. This library is special, just like a bird flying in the sky. There are different {#blank#}2{#/blank#} of books in this library. You can spend time {#blank#}3{#/blank#} books there. You can also choose some books you like from there {#blank#}4{#/blank#} return them three days later. There is a special box in front of the library. You can put some old books {#blank#}5{#/blank#} the box. Anyone can open the box and {#blank#}6{#/blank#} some books to read. These books can take away for {#blank#}7{#/blank#}. In return (作为回报), you need to put some old books in the box. It quickly became {#blank#}8{#/blank#} around the community. The box give people free books to read and make neighbors {#blank#}9{#/blank#}. Now this library has {#blank#}10{#/blank#} a hot topic online.

Woman： {#blank#}1{#/blank#}

Mary：Yes，please.I need a sweater for school.

Woman：OK. {#blank#}2{#/blank#}

Mary：Blue.

Woman： {#blank#}3{#/blank#}

Mary：It looks nice. {#blank#}4{#/blank#}

Woman：Nine dollars.

Mary：I'll take it.How much are those yellow socks？

Woman：Two dollars for one pair and three dollars for two pairs.

Mary：Great!I'll take two pairs.

Woman： {#blank#}5{#/blank#}

Mary：Thank you.

Woman：You're welcome.