Itisnot（）todiscussthequestionagain
单项选择题 It is not（）to discuss the question again and again.
A.worth?
B.worthy?
C.worthwhile?
D.worth?while
正确答案：C
答案解析: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。
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相关知识：第二章、语法与词汇
