问题
选择题
| 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 |
答案
答案：A
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| 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 |
答案：A