问题 更新时间2023/9/22 9:41:00 Years ago we didn’t know this, but recent science ______ that people who don’t sleep well soon get ill.(4.0分)A: showedB: has shownC: will showD: is showing 答案 登录 注册 B 出自:梦想在线 >> 武汉科技大学英语2