---I regret you John has been fired .
---I can hardly believe my ears .He is such a fine worker .
A. telling
B. having told
C. to tell
D. to have told
网友回答
A. telling
B. having told
(答案→)C. to tell
D. to have told
解析：考查动词regret的搭配，regret doing“后悔做过…”，regret to do“很遗憾要做”，句意是：--很遗憾地告诉你约翰被解雇了。--我几乎不能相信我的耳朵。他是这么好的工人。选C.
考点;考查动词的搭配