下面几个快听快答如何回答较好？

1/When is the Mid autumn festival?
2/Which is the second highest building in the world?
3/How smart the boy is?.

1. It's in September ,also in October.(一般不会有这题的，因为农历的时间不定。)
  要么就在聪明点回答：On August 15th by moon calender.
2. Maybe it's Shanghai World Financial Center .(估计也不会考到，因为涉及的词汇超出二级范围。)
3. Thank you.(对别人的夸奖接受并表示感谢即可.).

Thank you..

3. Yes,he is.  夸奖别人，不是夸奖自己。夸奖自己用Thank you..