We asked Professor Smith why vampires are so popular in the United States.

VOA: special.2010.01.20

Why do you think Beverly Hills is so popular and famous?

你觉得为什么比佛利山庄这么热门这么有名呢？

演艺界起源地 - SpeakingMax英语口语达人

Why is football so popular in the United States?

为什么橄榄球在美国这么流行呢？

美国和美式足球 - SpeakingMax英语口语达人

Here she explains part of why these films are so popular.

VOA: special.2009.03.25

"nine months." So why do they think cupcakes are so popular?

VOA: special.2010.04.12

Here she explains why she thinks fringe festivals are so popular.

VOA: special.2009.08.05

He says he understands why the Red Shirts are so popular.

VOA: standard.2010.05.25