Nothing but some ancient Chinese coins _______ in the sunken ship since they began the exploration.A.were foundB.was foundC.have been foundD.has been found
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D解析考察主谓一致。本题的主语为nothing与But后面的some ancient Chinese coins没有任何关系，故使用单数，排除AC。再根据since可知与完成时连用，故D正确。