— 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
网友回答
A. may have saved
B. must have saved
C. should have saved
D. could have saved
解析：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。