◎ 题干
There _______ a lot of trees here, but now it has become desert.
[     ]
A. is
B. are
C. used to be
D. used to being
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“There _______ a lot of trees here, but now it has become desert. [ ]A. is B. are C. used to be D. used to being…”主要考查了你对  【动词短语】【therebe句型】  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。