They decided to _____ a large medical conference.
A.foundB.formC.set upD.organize在线课程D
set up也具有“建立，成立”之意，如：set up a laboratory建立实验室；set up a hospital建医院；organize意为“筹备”。又如：organize a get-together筹备一次聚会；organize an English speech competition组织一次英语演讲比赛。