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最佳答案：How long do you have to wait for him?如果帮到你,请记得采纳,O(∩_∩)O谢谢
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最佳答案：Time how long it can hold .
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最佳答案：how long can keep this novel 这里用持续性动词keep 希望帮到你 满意的话 望采纳
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最佳答案：这里最好用将来时态how long are you going to stay in Beijing
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最佳答案：How long will you stay in Dalian?呆多久How long have you been in Dalian?来多久
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最佳答案：隔多久,how often多久之后how soon多久how long
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最佳答案：How long are you going to stay in our hotel?
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最佳答案：I don't know hou long will you go