【题目】Tom was sorry to learn that his grandfather _____ for half an hour when he got to the hospital．
A． had died B． had been dead
C． Died D． has been dead
在线课程【答案】B
【解析】根据从句when he got to the hospital中可知，die的动作发生在这之前，即过去的过去；另外，die是短暂性动词，不能和时间段相连。be dead表示状态，可以和时间段相连。句意：Tom赶到医院时被告知他的祖父已经离开半小时了，他非常难过。