The article consists of three stories about ________________ . The first story is about a __________ named Wan Hu, who made an unsuccessful attempt at ____________ in A.D.1500. He built a spaceship powered by 47 rockets using _________ . His idea was _______ , but his dream of flight ________ 500 years later when China successfully launched its first manned Shenzhou V spaceship. The second one is about the Spruce Goose, a ________ designed to meet the need of ________ troops and materials during World War II. It was made entirely of ________ and still holds the record for _________ . Although it was ________ put to use, many of its design features have been incorporated into today’s _________ . The last is about Leonardo da Vinci, the most famous artist of the Renaissance. Apart from his great artistic work, he also drew sketches of _________ with flapping wings controlled and steered by ____________ . ____________years later, a professional parachutist made a successful jump using a wood and canvas parachute based on one of __________ designs/sketches .