问题
选择题
__________ from heart trouble for years Mr. White has to take some medicine with him wherever he goes.
A．Suffered
B．Suffering
C．Having suffered
D．Being suffered
答案
答案：C
考查非谓语动词。逻辑主语Mr. White与suffer之间为主动关系，根据句意为已经完成，故用其having done形式，选择C。