问题描述：
English Riddles 英语脑筋急转弯
1.What question can never be answered by "Yes"?
2.What's even harder to catch if you run faster?
3.Why is the library the highest building?
1.What question can never be answered by "Yes"?
2.What's even harder to catch if you run faster?
3.Why is the library the highest building?
问题解答：
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