填空题. A．bound B．substance C．acquire D．produce E．invented F．complicated G．complex H．astonishing I．created J．passage K．material L．as M．had swum N．then O．chains We all know that a magician does not really depend on "magic" to perform his tricks, but on his ability to act at great speed. However, this does not prevent us from enjoying watching a magician 1 rabbits from a hat. Probably the greatest magician of all time was Harry Houdini who died in 1926. Houdini mastered the art of escaping. He could free himself from the tightest knots or the most 2 locks in seconds. Although no one really knows how he did this, there is no doubt that he had made a close study of every type of lock ever 3 . He liked to carry a small steel needle-like tool strapped to his leg and he used this in place of a key. Houdini once asked the Chicago police to lock him in prison. They 4 him in chains and locked him up, but he freed himself in an instant. The police accused him of having used a tool and locked him up again. This time he wore no clothes and there were 5 round his neck, waist, wrists, and legs; but he again escaped in a few minutes. Houdini had probably hidden his "needle" in a wax-like 6 and dropped it on the floor in the 7 . He stepped on it so that it stuck to the bottom of his foot 8 he went past. His most famous escape, however, was altogether 9 . He was heavily chained up and enclosed in an empty wooden chest, the lid of which was nailed down. The chest was waned into the sea in New York harbor. In one minute Houdini 10 to the surface. When the chest was brought up, it was opened and the chains were found inside.