______from heart trouble for years,Professsor Wang has to take some medicine with him wherever he:Suffered B:Suffering C:Having suffered D:Being suffered
问题描述:
______from heart trouble for years,Professsor Wang has to take some medicine with him wherever he
:Suffered
B:Suffering
C:Having suffered
D:Being suffered
答
B. 现在分词表原因。
答
B
答
c
suffer 不及物
用完成式表示对现在的影响
答
c