题目内容：

Who designed the first helicopter(直升飞机)? Who 1. (draw) one of the most famous pictures in the world? Who knew more about the human body than most 2. (doctor) did? There is an answer 3. all these questions --- Leonardo de Vinci.

Leonardo lived in Italy around the year 1500, but many of his 4. (invent) seem modern to us today. For example, one of his notebooks has drawings of a helicopter. Of course, he couldn’t build 5. helicopter with the things he had. But scientists say his idea would have worked. That’s why he was considered 6. (be) a genius that has ever been known.

But Leonardo wasn’t just an inventor. He was one of the 7. (great) artists of his day. When he was only twenty years old, he 8. (call) a master painter, and as he got older he became even more famous. Sometimes he drew a hand in ten different ways 9. he was ready to paint. Many of Leonardo’s wonderful paintings are still with us today. You may know one of his most famous works--- the 10. (smile) woman known as the Mona Lisa.