问题描述: 英语翻译当下雨时,我们必须带上雨伞当我们睡觉时,我们最好使窗户开着 1个回答 分类:英语 2014-12-06 问题解答: 我来补答 We must take the umbrella when it's raining.We'd better keep the windows open when we are sleeping. 展开全文阅读