第2题: [单项选择]The introduction of gunpowder gradually made the bow and arrow______, particularly in Western Europe. A. obsolete B. obscure C. optional D. overlapping 参考答案:A 答案解析:解析:句意:火药的引入使得弓箭逐渐过时,在西欧尤其如此。 “obsolete”废弃的、过时的,“obscure”费解的、暗淡的, “optional”选择的, “overlapping”重叠的。