【正确答案】 B

【答案解析】[解析]
There were fierce battles in Gaza on Friday as Hamas and Israel both rejected a United Nations call for an immediate cease-fire. The densely populated area faces shortages of food, medicine, water and electric power.
Friday, the top U.N. human rights official called for an independent investigation into possible war crimes by both sides in the conflict. Navi Pillay, in Geneva, criticized Hamas leaders for the harm caused to Israeli civilians by rocket fire. And she warned against the use of people in Gaza as human shields.
[6] A U.N. report, using numbers from the Palestinian Health Ministry, said almost seven hundred and fifty people have been killed in Gaza. The report Said about a third were children. At least eighteen Israelis have been killed, including nine soldiers.

本题的出题点在数字处，题干的核心词是children were killed。新闻提到，据巴基斯坦卫生部称，此次冲突造成加沙居民750人死亡，其中1/3是儿童，由此可知有大约250名儿童在此次冲突中死亡，故选B。