This is a book. 翻译:这是一本书。
This is a ruler. 翻译:这是一把直尺。
This is a pencil. 翻译:这是一支铅笔。
This is a schoolbag. 翻译:这是一个书包。
What's this? It's a bird. 翻译:这是什么?
What's this? It's a dog. 翻译:这是什么?
What's this? It's a tiger. 翻译:这是什么?
What's this? It's a monkey. 翻译:这是什么?
What's this? It's a cat. 翻译:这是什么?
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