单选题
I regret ______ harder at office.
A、
not to have worked
B、
not having worked
C、
not have worked
D、
having not worked
【正确答案】
B
【答案解析】
regret遗憾;抱歉。后面既可以跟不定式强调将要发生的事情,也可以跟动名词强调已经发生的事情,如:I regret spending so much money on a car. 我后悔在一辆小汽车上花这么多钱。I regret to say I cannot come.很抱歉,我不能来了。
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