【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.（上周五发生的第一次爆炸致使12人丧生。一辆载满炸药的摩托车冲向载有参加朝拜的什叶派信徒的巴士，引发爆炸。）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.（另一破爆炸发生在医院急诊室入口处，第一次爆炸受害者正在里面接受治疗。）At least 13 people were killed in that attack.