He had been ______ to appear in court on charges of incitement of lawbreaking.
 
【正确答案】 B
【答案解析】 上下文语义。根据句中court(法院)提供的语境,只有summon(传唤,召集)符合逻辑。故答案为B。illuminate“照亮,启蒙”;prevail“说服,诱使,盛行”;trail“跟踪,被拖在后面”。