英语 八年级 填空题 较难

be supposed to 表达礼仪规范 — 英语填空题

鲁教版·英语 Unit 6 Crossing Cultures AI 三重审校通过

题目
At a welcome dinner, local custom requires guests to use their right hand when passing food. Mia says, “I know the custom, but I’ll use my left hand.” Her friend corrects her: “You ___ use your right hand when passing food.” Fill in the blank with the correct form of be supposed to.