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?