you are doing, it's as if you could stand in for them，" said Jennifer Cool, an anthropologist at USC who studies Internet culture and history. "You can be in the shoes of Lady Gaga or Bill Gates, too."

　　And, of course, there's showing off factor, Internet is a place to show off and promote yourself, filled with incredible vacation photos, reminders to all that you're in love with challenges. You may have some friends who've seemed eager to show off their bikini or swim trunk bodies in their Ice Bucket Challenge videos. At this point, some celebrities seem to be trying to one­up each other. Bill Gates released a highly produced video of himself designing a method of dumping water on himself. Hockey player Paul Bissonnette, for some reason, had a helicopter drop glacier water on him.

　　语篇解读：本文是一篇说明文，介绍了曾经风靡一时的"冰桶挑战"活动。

3．Why does the author call the Ice Bucket Challenge a viral phenomenon?

　　A．Because it does harm to charity.

　　B．Because it is popular with celebrities.

　　C．Because it challenges a person's courage.

　　D．Because it spreads quickly.

　　解析：选D　推理判断题。根据第一段中的"2.4 million videos related to the ice bucket ... liked a post relating to the challenge."和第三段第一句可知，作者之所以把"冰桶挑战"称为"病毒现象"是因为"冰桶挑战"传播很快，已经有数千万人参加并把相关视频分享到网络上。

4．What does "a stroke of genius" in Paragraph 2 mean?

　　A．A kind of charity.　　　 　B．A smart way.

　　C．A nature of charity. D．A public forum.

　　解析：选B　词义猜测题。根据第二段中的"Marrying the Internet's love of challenges with donation and charity"和"it's absolutely pure brilliance"可知，利用互联网热爱挑战，融合捐献和慈善，绝对是个聪明的做法。"A smart way"符合词语的意思。

5．According to the text, the Ice Bucket Challenge gives celebrities ________.

　　A．a sense of belonging B．a joy of success

　　C．a feeling of bravery D．a sense of curiosity

解析：选A　推理判断题。根据第五段中的"it's almost difficult to find a celebrity who hasn't had ice water dumped on his or her head"可知，名人几乎都参加了冰桶挑战，如果