问题描述：
what's the most difficult train to catch?
who will be your real friend,a poor one or a rich one?why?
who is closer to you,your mom or your dad?
how can you make a slow horse fast?
who will be your real friend,a poor one or a rich one?why?
who is closer to you,your mom or your dad?
how can you make a slow horse fast?
问题解答：
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