【答案】

4. C 5. D

【原文】

Pakistan's Prime Minister Yousuf Raza Gilani has appealed for calm after two bombings in the city of Karachi killed 25 people and injured dozens more. The attacks-the second at a hospital where victims of the first attack were being treated-targeted Shia pilgrims.
（4）The first of Friday's blasts-caused by a motorbike laden with explosives targeting a bus carrying Shias to a religious procession-killed 12 people.（上周五發生的第一次爆炸致使12人喪生。一輛載滿炸藥的摩托車沖向載有參加朝拜的什葉派信徒的巴士，引發爆炸。）Then,（5）another bomb exploded outside the entrance to the emergency ward of the hospital where the victims of the first attack were being treated.（另一破爆炸發生在醫院急診室入口處，第一次爆炸受害者正在里面接受治療。）At least 13 people were killed in that attack.