2. The river was so polluted that it _________ (actual) caught fire and burned. 修饰谓语动词caught，用副词作状语，表示“居然”。 3. Mark had been scolded before for touching his father’s ____________ (equip). 前有名词所有格修饰，故此处应填名词，表示“设备”。
actually
equipment
