阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。
Words like “thanks” and “please” have become pet phrases for NA Yuegang. As one of the voluntvrrs at this year's Asia-Pacific Economic Cooperation (APEC) forum(论坛),he assists more than 100 international representatives. But Na Yuegang in not alone. More than 600 volunteers from 13 universities in Beijing contribute to the APEC meeting. according to Beijing Daily.
