Question

—I regret _____ you that Mary was badly injured in the accident.
—I can hardly believe my eyes. She is always so careful.

A．informing

B．having informed

C．to inform

D．to have informed

Answer 1

C

试题分析：考查regret用法。动词regret有两个短语：regret to do sth遗憾要做某事；regret doing/having done sth遗憾做了某事；句意：我很遗憾地告诉你Mary在事故中受了重伤。故C心中却。
点评：要注意该词连接不定式和动名词所表示的不同的意义，要区别事情未做还是已经完成。这样的用法在日常学习中要注意积累的归类。