Because he didn't know how to do the homework，he went to ask his teacher for help.
→
Not knowing how to do the homework
Not knowing how to do the homework
，he went to ask his teacher for help.

【答案】Not knowing how to do the homework

【解答】

【点评】

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发布：2025/1/1 7:30:1组卷：2引用：2难度：0.5

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Because he didn't know how to do the homework，he went to ask his teacher for help.→Not knowing how to do the homeworkNot knowing how to do the homework，he went to ask his teacher for help.