I have always regretted ______ harder at school.A．not to study B．to not studyC．h

题干

I have always regretted ______ harder at school.

A．not to study	B．to not study
C．having not studied	D．not having studied

上一题下一题 0.64难度单项选择更新时间:2013-07-01 08:12:43

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