◎ 题干
It was not _____ they came back.
[     ]
A. long before
B. before long
C. long time before
D. long after
◎ 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“It was not _____ they came back. [ ]A. long before B. before longC. long time before D. long after …”主要考查了你对  【副词】  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。