Over five hundred years ago, a man designed a【B1】______machine. He also invented a helicopter. This【B2】______man was an Italian.

Over five hundred years ago, a man designed a(ll)flying machine. He also invented a helicopter. This(12)clever man was an Italian. He was called Leonardo Da Vinci.
    He was good at everything he tried. We remember him today, however, as an artist. He was one of the greatest artists the world has ever(13)produced. You may have heard of a picture called "Mona Lisa". He painted that. While he was in Milan, he painted a(14)special picture. He drew it on the wall of a monastery(修道院)dining room. Many people say this picture is the greatest one ever painted. It’s called "The Last Supper". Da Vinci worked hard painting this picture. Often he worked all day and never(15)stopped to eat or drink.