问题
选择题
— The terrible accident is under investigation.
— Actually, quicker action _________ those workers trapped in the mine.
A．may have saved
B．must have saved
C．should have saved
D．could have saved
答案
Ｄ
情态动词用法辨析。Ａ也许会做某事；Ｂ一定做了某事；Ｃ本应该做某事；Ｄ本可以做某事；结合句意可知Ｄ正确。句意：—这个可怕的事故正在调查中。—实际上，迅速行动本可以挽救那些被困在煤矿中的工人。