I hear they are going to London, but I don’t know ________ they will stay there. A. how soonB. how o...
2023-02-06 13:56:25 186次 2014年初中毕业升学考试（内蒙古呼和浩特卷）英语（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
I hear they are going to London, but I don’t know ________ they will stay there.
A. how soonB. how often
C. how longD. how fast
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