摘要:A: Which is the biggest, the sun, the moon or the earth? B: The sun (is the biggest of the three). A: Which is the smallest? B: The moon. A: Does the sun go round any star? B: No. But the earth goes round the sun, and the moon goes round the earth. A: Has the sun get its own light? B: Yes. It gives its light to the earth and the moon.

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