Final answer:
The correct sentence using a colon is: 'The day felt like a long winding road: it seemed as if it would never be over.'
Step-by-step explanation:
The sentence that uses a colon correctly is: The day felt like a long winding road: it seemed as if it would never be over. A colon is used to introduce a list, an explanation, or a quote. In this sentence, the colon is used to introduce the explanation or description that follows, which is how the day felt like a long winding road.
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