问题描述: I usually sleep with the window open()it is very cold.Aunless Bas Cif 1个回答 分类:英语 2014-11-03 问题解答: 我来补答 【选 A】I usually sleep with the window open (unless) it is very cold.除非天很冷,不然我通常开窗睡.A unless 除非B as 因为C if 如果 展开全文阅读