◎ 题干
I was told that it was a very serious disease. If left _____ properly, the patient might lose his ability to walk
about in just a year or so.

[     ]

A. untreat
B. untreated
C. being untreated
D. to untreat
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“I was told that it was a very serious disease. If left _____properly, the patient might lose his ability to walk about in just a year or so.[ ]A. untreat B. …”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。