问题
选择题
_____ from heart trouble for years, Professor White has to take some medicine with him wherever he goes.
A．Suffered
B．Suffering
C．Being suffered
D．Having suffered
答案
答案：D
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_____ from heart trouble for years, Professor White has to take some medicine with him wherever he goes.
A．Suffered
B．Suffering
C．Being suffered
D．Having suffered
答案：D