—Could you tell us _________ to do it? —Of course. First of all, you should clean the wall, then cle...
2023-02-10 14:29:34 99次 2013-2014学年山东省泰安市泰山区九年级上学期期末学情检测英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
—Could you tell us _________ to do it?
—Of course. First of all, you should clean the wall,
then clean the floor.
A. when B.
what C.
how D.
whether
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