题目

　　　heart disease for many years,he had to take medicine everywhere. A.Having suffered from　　　　　　　　B.Have suffered from C.To suffer from　　　　　　　　　　　D.Suffering 答案：A 解析: 本题考查suffer from的用法“患……病”，同时由句中时间状语知需用现在分词完成式。

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