The money collected should be made good use the people in need.
A. of helping
B. to help
C. of to help
D. to helping
网友回答
A. of helping
B. to help
(答案→)C. of to help
D. to helping
解析：make good use of充分利用，make good use of sth to do sth,充分利用某物来做某事，不定式表目的，故选C.