根据短文理解，从A、B、C、D四个选项中选择最佳一项填空。

    Who was the designer of the first helicopter? Who 1 the most famous picture in the world? Who knew more about the human body than most 2? There is an answer 3 all these questions—Leonardo da Vinci(达·芬奇).

    Leonardo may have been the greatest genius(天才) 4 have ever known. He lived in Italy around the year 1500, 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 5 a helicopter with the things he had. But scientists say his idea would have worked.

    But Leonardo 6 an inventor. He was also 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 7 more famous. Sometimes he drew a hand ten different ways 8 he was ready to paint.

    Many of Leonardo's wonderful paintings are still with 9 today. You may know one of his most famous works—the 10 woman known as the Mona Lisa.