介绍:
A farmer has 17 sheep，and all but nine die. How many are left?
What day of the week is the best for having fried food?
Why is SMILES the longest word in the English language?
It is as light as a feather, yet no man can hold it for long. What is it?
You see a boat full of people yet there isn’t a single person on board (在船上）.how is it possible?
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