Who designed the first helicopter（直升机）？Who _______ the most famous pictures in the world？Who knew more about the human body than most _______？There is an answer _______ all these questions-Leonardo da Vinci（里奥纳多·达·芬奇）.

Leonardo may have been the greatest genius（天才）_______ have ever known. He lived in Italy around the year 1，500，but many of his inventions seem modern to us today. For example，one of his notebooks has drawings of a helicopter. Of course， he couldn't _______ a helicopter with the things he had. But scientists say his idea would have worked.

But Leonardo _______ an inventor. He was one of the greatest artists of his day. By the time he was twenty years old，he was called a master painter，and as he got older he became _______ more famous. Sometimes he drew a hand in ten different ways _______ he was ready to paint.

Many of Leonardo's wonderful paintings are still popular with _______ today. You may know one of his most famous works-the ________ woman known as the Mona Lisa.