𝗥𝗲𝗮𝗱 𝗮𝗻𝗱 𝗳𝗶𝗹𝗹 𝗶𝗻 𝘁𝗵𝗲 𝗴𝗮𝗽𝘀.
Students _____ run in the school corridors. It’s against the rules.

• mustn’t
• don't have to
• doesn't have to
• needn’t