New Words：

upon [ə'pɔn] prep. 在 ... 上
once upon a time 以前，从前，那时候；很久以前

Sample Sentences：

He climbed upon his horse.
How much it costs depends upon how much you buy.

Once upon a time there was no tea at all in England.
Once upon a time, there was an old man living in a small village.

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