◎ 题干
The trouble with resources as coal, oil and gas _____ that they are not renewable.
[     ]
A. has been
B. is
C. have been
D. are
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据魔方格专家分析,试题“The trouble with resources as coal, oil and gas _____ that they are not renewable.[ ]A. has been B. isC. have been D. are …”主要考查了你对  【主谓一致】  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。