— The terrible accident is under investi...

— 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

Ｄ【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。

考点分析：

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