【题目】Our school_____ the 50th anniversary of the founding of CCFLS on October 5th, 2013.
A. detected B. activated C. spotted D. celebrated
在线课程【答案】D
【解析】
试题分析：考查动词词义辨析。句意：我们学校庆祝了建立CCFLS50周年纪念。A. detected察觉；B. activated活动；C. spotted发现；D. celebrated庆祝；根据句意可知选D。