◎ 题干

.In order to prevent the fire spreading, some of the houses nearby _____before the firemen arrived.
A.have been pulled down B.have pulled down
C.had been pulled down D.had pulled down
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据n多题专家分析,试题“.In order to prevent the fire spreading, some of the houses nearby _____before the firemen arrived.A.have been pulled down B.have pulled downC.had been pulled …”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。