◎ 题干
Three quarters of the forest ________ burnt to ashes, and the rest _______ cut down for construction.  
[     ]
A. was, have been  
B. was, has been     
C. have been, is    
D. has been, are
◎ 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“Three quarters of the forest ________ burnt to ashes, and the rest _______ cut down for construction.[ ]A. was, have been B. was, has been C. have been, is D…”主要考查了你对  【一般过去时】【现在完成时】  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。