昨天他应该把所有的桌子都打扫干净了 He ___ ___ ___ clean all the tables yesteHe ___ ___ ___ clean all the tables yesterday.
问题描述：
昨天他应该把所有的桌子都打扫干净了 He ___ ___ ___ clean all the tables yeste
He ___ ___ ___ clean all the tables yesterday.
答
was supposed to