题目

It is reported that the government has _______ the outbreak of violence by sending a large group of soldiers to police the area. A. gone for                         B. reacted to            C. appealed to                D. made for 答案：B 【解析】句意：据报道政府已经对暴乱的发生做出反应，派了一群士兵去这个地区维护治安。gone for努力争取；reacted to 对……做出反应；appealed to吸引；made for有助于，前往，故选B项。在等比数列中，公比为2，前3项和为21，则___________