must与should表示建议和禁止 — 英语选择题
题目
Tom 有轻微感冒但仍想和同学去游泳。医生对他说了四句话。下列哪一句医生不可能说？
A. You should drink more warm water.
B. You mustn't swim in the cold pool today.
C. You should have a good rest at home.
D. You must go swimming with your classmates right now.