![The purpose of two questions in the second paragraph is to ________. [A] demonstrat](http://www.mshxw.com/aiimages/29/21009.png "The purpose of two questions in the second paragraph is to ________. [A] demonstrat")
Thepurposeoftwoquestionsinthesecondparagraphisto________.
[A]demonstr atewhypeopleareamused
[B]displaywhatpeoplelaughat
[C]bringtolightthephenomenonoflaughter
[D]accentwhataphenomenonlaughterreallyis
正确答案：D在文章的第二段中，作者的两个反问句都是针对笑及笑时的表情的，其目的在于强调笑这种现象究竟是什么。所以本题的正确答案应当为D。
