I don’t think it is taking the trouble to explain the question to him.
A. worth
B. worthy
C. worth of
D. worthwhile
网友回答
A. worth
B. worthy
C. worth of
(答案→)D. worthwhile
解析:be worth后的动名词要用主动表被动。与worth相似的worthy却不一样,其后不接动名词而接不定式(若接动名词则其前应有介词of),且要用被动式表示被动含义。Worth是价值的意思,worthwhile值得做的,根据后面动名词短语作状语,故选D,