1. 3 彩虹小读者：咦，那是什么

Listen to the audio and choose the correct answer.

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Listen to the audio and choose the correct answer.

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Listen to the audio and choose the correct answer.

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Listen to the audio and choose the correct answer.

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Listen to the audio and choose the correct answer.

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Listen to the audio and choose the correct answer.

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Listen to the audio and choose the correct answer.

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Listen to the audio and choose the correct answer.

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Listen to the audio and choose the correct answer.

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Listen to the audio and choose the correct answer.

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