________ how to do the homework, I went to ask my teacher for help. A. Not knownB. Not knowing C. No...
2022-10-08 17:57:38 95次 2015-2016学年北京一零一中学高二下期末考试英语卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
________ how to do the homework, I went to ask my teacher for help.
A. Not knownB. Not knowing
C. Not knowD. Not being known
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