问题补充:
It is difficult to judge whether what he said.
A. is worth to be praised
B. is worthy being praising
C. is worthy of being praised
D. is worth being praised
答案:
A. is worth to be praised
B. is worthy being praising
(答案→)C. is worthy of being praised
D. is worth being praised
解析:动名词表示反复发生的动作,不定式表示一次性的动作,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。
所以选C。