Mr Smith has cancer for two years but he is still working very hard.
A. suffered
B. suffered from
C. suffered by
D. suffering from
网友回答
A. suffered
(答案→)B. suffered from
C. suffered by
D. suffering from
解析：词语辨析。根据时间状语for two years可知要用现在完成时态，排除D；suffer遭受痛苦，损害等；suffer from患某种疾病。句中宾语是cancer，癌症。所以选B。