◎ 题干

The fire,believed to      due to illegal construction on the building’s roof, was brought
under control after an hour.
A.have occurredB.occur
C.have been occurring D.be occurring
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“The fire,believed to due to illegal construction on the building’s roof, was brought under control after an hour.A.have occurredB.occurC.have been occurring D.…”主要考查了你对  【一般现在时】【将来进行时】【过去完成进行时】【过去将来时的被动语态】  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。