请根据提示情节, 用英语写一个小故事, 并为该故事设计一个出人意料的结尾。
1. Mr Black and Mr Smith haven’t seen each other for years.
2. They used to be neighbours and enjoyed a good relationship.
3. Three years ago, Mr Black moved to Australia with his family.
4. Last week, Mr Black returned.
5. (the ending). . .
注意: 1. 词数80左右;
2. 可以适当增加细节, 以使行文连贯。
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