【評論主題】The police officer saw the labors who had gathered in front of the city hall ___________ the street

【評論內容】感觀動詞+ving 表動作正在進行； +原v 表陳述事實

【評論主題】The police officer saw the labors who had gathered in front of the city hall ___________ the street

【評論內容】感觀動詞+ving 表動作正在進行； +原v 表陳述事實