It is not __________to discuss the question again and again.

It is not __________to discuss the question again and again.
A、worth
B、worthy
C、worthwhile
D、worth while
【正确答案】：C
【题目解析】：be worth+名词:值……的，be worth doing sth:值得做，be worthy of+名词:值得……的，be worthwhile to do sth#_#值得做某事。