The manager demanded that the work within three days.
A. was finished
B. had been finished
C. be finished
D. finished
网友回答
A. was finished
B. had been finished
(答案→)C. be finished
D. finished
解析：动词demand后面宾语从句中的动词应该用should do，should可省略。故选C项。此类动词常见的有：insist; suggest, advise, propose, remend, demand, mand, require, desire, request, urge, order等。