使用must/mustn't表达班级规则 — 英语选择题
题目
班级新来了交换生Tom。值日班长告诉他："Don't run in the hallway.（走廊里不许奔跑。）"Tom想了想，用must/mustn't重新说了这条规则。他说的是哪一句？A. We must run in the hallway. B. We mustn't run in the hallway. C. We mustn't walk in the hallway. D. We must walk in the hallway.