How many men does your uncle for him?
A. have worked
B. have to work
C. have working
D. have been working
网友回答
A. have worked
B. have to work
(答案→)C. have working
D. have been working
解析：考查时态。句意“你叔叔让多少人来为他工作啊？”have是使役动词，have sb. do sth.“使某人做某事”；have sb. doing sth.“使某人一直做某事”。根据四个选项可知，C项符合题意。故选C。