With a preposition: <br>When the sun sank ______ the horizon, we made our way to the hotel and had a good night's sleep.

With a preposition:
When the sun sank ______ the horizon, we made our way to the hotel and had a good night's sleep.

With a preposition:
When the sun sank ______ the horizon, we made our way to the hotel and had a good night's sleep.
【正确答案】：below

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