听力原文： The Bosnian Serb government has given state prosecutors a list of nearly 900 people suspected of involvement in a massacre of thousands of Muslims at Srebrenica during the Bosnian War. (25)All of those named hold official positions. (24)Last year, the government acknowledged that Bosnian Serb forces were involved in a massacre in 1995 of more than 7, 500 Muslim men and boys when they overrun Srebrenica and surrounding areas. The government said it showed its determination to meet its obligations. How many people were killed in the massacre?