英语 四年级 选择题 简单

使用must/mustn't描述规则 — 英语选择题

人教大同版·英语 Unit 1 Class rules AI 三重审校通过

题目
在图书馆里,我们应该保持安静,不应该大声说话。选择正确的句子描述这条规则:A. You must talk loudly in the library. B. You must keep quiet in the library. C. You mustn't keep quiet in the library. D. You must run in the library.