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r: Little Duck promises his grandma that he is going to visit her in the morning, but he was late! Why is that? (星期天,小鴨子在睡覺。) Little Duck: Good morning, Mr. Cat. How are you? Mr. Cat: Fine. And you? Little Duck: I’m fine, too. What are you doing? Mr. Cat: I’m catching fish! I see a big fish but I c