根据下面四幅画的内容，用英语写一篇短文，描述Tom和爷爷星期天外出钓鱼的故事。

提示词语：水桶：water bucket 告示：notice

词数：100左右

One Sunday Tom went fishing with his grandpa。 They were very lucky， for his grandpa caught a big fish。

Tom was about to go back home with his grandpa carrying the fish in a water bucket when he suddenly saw a notice by the river saying “No Fishing”。 Tom put the fish back to the river at once。 Seeing this， his grandpa got much surprised。

Then Tom explained to his grandpa。 “There is a notice over there。 It says， ‘No Fishing’”。 His grandpa nodded and said， “You are right。 We must not catch fish in the wrong place。 ”

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