问题 更新时间2023/12/8 16:22:00 Years ago we didn’t know this, but recent science ______ that people who don’t sleep well soon get ill.(2.5分)A: showedB: has shownC: will showD: is showing 答案 登录 注册 B 出自:梦想在线 >> 武汉科技大学大学英语2