Such a problem still exists because no adequate measures for preventing it _____ taken in the past.
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A. are
B. had
C. were
D. had been.
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根据魔方格专家分析,试题“Such a problem still exists because no adequate measures for preventing it _____ taken in the past. [ ]A. are B. had C. wereD. had been. …”主要考查了你对 【一般过去时】 等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。
与“Such a problem still exists because no adequate measures for preventing it _____ taken in the past. [ ]A. are B. had C. wereD. had been. ”考查相似的试题有: