He doesn’t know what __________ the problem. A. to do B. do C. to do with D. do with
2022-11-16 11:25:19 30次 2015-2016学年江苏镇江八年级下期中考试英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
He doesn’t know what __________ the problem.
A. to do
B. do
C. to do with
D. do with
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