23.Medicalaccidents _____ by drugs have attracted much attention in that country.

23.Medicalaccidents _____ by drugs have attracted much attention in that country.

题目
23.Medicalaccidents _____ by drugs have attracted much attention in that country.
A.causing B.to be caused C.be caused D.caused
答案
caused 在这里是过去分词,充当定语,相当于 which / that was caused;
be caused 是动词原形,动词原形通常不做定语;
句子意思:由药物引起的医疗事故在那个国家已经引起了极大的关注.
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