英语 六年级 填空题 标准 ★ 精品

must/mustn't用法 — 英语填空题

译林版·英语(三起) Unit 5 Signs AI 三重审校通过

题目
Look and complete: The sign "No smoking" means people ___ smoke here. The sign "Wet floor" means we ___ walk carefully. In the library, we ___ keep quiet. In the restaurant, we ___ litter.