In October 2001, twenty-one countries and areas（地区）________ the APEC meeting in Shanghai. China ________ the organization（组织）in 1991.A.took part in; joinedB.joined; took part inC.took part; joined inD.joined; took part
网友回答
A解析参加某一个活动用take part in或join in，而加入某一个组织要用join。