The math problem is so hard. I really don’t know _____. A. what to do it B. how to do C. how to do i...
2022-11-08 02:13:48 80次 2014-2015学年湖南益阳第六中学高一上期中英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
The math problem is so hard. I really don’t know _____.
A. what to do it B. how to do
C. how to do it D. what do it
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