【题目】As many as 150 people died in the explosion. If only the owners ____ enough attention to the safety measures!
A. paid B. should pay
C. would pay D. had paid
在线课程【答案】D
【解析】
考查虚拟语气。句意：多达150人在爆炸中丧生。要是业主对安全措施给予足够的重视就好了！根据句意可知，此处表示与过去事实相反的情况，应使用过去完成时。故D选项正确。