Task C. Complete the sentences with must or mustn't. 1. You ______ animals at the zoo. It's dangerous. 2. You ______ eat in the library. 3. You ______ wear a uniform at school. 4. You ______ walk on the grass. 5. You ______ listen to your parents. 6. You ______ drop litter in the streets. 7. You ______ use a mobile phone in the class.

Task C Answers:

• 1. You mustn't animals at the zoo. It's dangerous. (It is forbidden and dangerous to touch animals at the zoo).
• 2. You mustn't eat in the library. (Eating is generally not allowed in libraries).
• 3. You must wear a uniform at school. (This is likely a school rule).
• 4. You mustn't walk on the grass. (This is often a rule in parks or specific areas to protect the grass).
• 5. You must listen to your parents. (This is a moral obligation and a common rule).
• 6. You mustn't drop litter in the streets. (Dropping litter is against the law and socially unacceptable).
• 7. You mustn't use a mobile phone in the class. (This is a common rule in classrooms to avoid distraction).