题目

       I was walking along the deserted main street of a small seaside town in the north of England looking for somewhere to make a phone call. My car had broken down outside the town and I wanted to contact the Automobile Association. Low grey clouds were gathering across the sky and there was a cold damp wind blowing off the sea which nearly threw me off my feet every time I crossed one of the side streets. It had rained in the night and water was dripping from the bare trees that lined the street. I was glad that I was wearing a thick coat.        There was no sign of a call box第一次世界大战爆发的根本原因是： [     ]A、垄断资产阶级要抢占国外市场 B、列强争夺巴尔干的斗争愈演愈烈 C、帝国主义政治经济发展不平衡 D、帝国主义两大军事集团已形成