must/mustn't表必须与禁止 — 英语选择题
题目
在学校实验室，学生必须戴护目镜，禁止品尝实验材料。哪张提示卡表达正确？ A. You must wear safety glasses. You mustn't taste the materials. B. You mustn't wear safety glasses. You must taste the materials. C. You must wear safety glasses. You must taste the materials. D. You mustn't wear safety glasses. You mustn't taste the materials.