He didn't pass the exam. He regretted __
题型:选择题
问题:
He didn't pass the exam. He regretted _____ harder. [ ]
A. not having worked
B. having not worked
C. to have not worked
D. not to work
He didn't pass the exam. He regretted _____ harder. [ ]
A. not having worked
B. having not worked
C. to have not worked
D. not to work