◎ 题干
       from heart attack for years, Professor Wang has to take some medicine with him wherever he goes.  
[     ]
A. Suffered
B. Suffering
C. Having suffered
D. Being suffered
◎ 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“ from heart attack for years,Professor Wang has to take some medicine with him wherever he goes.[ ]A. SufferedB. Suffering C. Having sufferedD. Being suffer…”主要考查了你对  【现在分词的完成式】  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。