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— 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。
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