多选题 Once the principal ______ that the fire alarm had been set off by accident, she apologized to the suspected students and announced that they had been ______.
【正确答案】 A、D
【答案解析】[解析] ●and说明前后同义重复；apologized to取反。
●第二空与suspect(被怀疑的)反义重复。exonerate免除责任，reprimand谴责，enlighten教导。答案选D。
●realize意识到，deny否认，decry公开谴责。代入选项，答案选A。