◎ 题干
— Was the problem solved at the meeting?
— Not yet. I'm afraid it may lead to more serious ones if _____ unsolved.

[     ]

A. making
B. remained
C. left
D. taking
◎ 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“— Was the problem solved at the meeting? — Not yet. I'm afraid it may lead to more serious ones if _____ unsolved.[ ]A. making B. remained C. left D. tak…”主要考查了你对  【过去分词】  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。