用方框中所给词语的适当形式填空，使短文正确、通顺、连贯（每词限用一次）。
Tom got along with all of his neighbors except the man who lived next door. The man never spoke to a (1) and no one knew what he did for a living.
One day, when Tom came home f (2) work, he found a diamond necklace outside his door. Tom wondered w (3) it came from.
Tom t (4) that perhaps someone had dropped the necklace, s (5) he planned to take it to the police station the next day. He thought the police would be able to find the o (6). Just then, the police came to Tom’s home and saw the necklace in his hand. Tom was very shocked when he was c (7) with robbery. A policeman told him that a jewellery shop had been r (8). A witness said that she had s (9) someone run from the jewellery shop into Tom’s building right a (10) the robbery.
Tom was not guilty, but how could he prove it?