◎ 题干

Luckily ______ to be no one under the tree when it broke down.
A.it happenedB.there happenedC.there usedD.it had
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Luckily ______ to be no one under the tree when it broke down.A.it happenedB.there happenedC.there usedD.it had…”主要考查了你对  【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。