V- Complete the second sentence with no change in the meaning, using modal verb "must" or "mustn't"
1. It is wrong of us to drop litter in the street.
→ We mustn't drop litter in the street.
2. It's obligatory for all drivers to have a driving licence.
→ All drivers must have a driving license.
3. You aren't allowed to smoke in this area.
→ You mustn't smoke in this area.
4. You aren't allowed to use the mobile phone during the exam.
→ You mustn't use the mobile phone during the exam.
5. Eating chewing-gum in the class is prohibited.
→ Students mustn't eat chewing gum in the class.
6. It's forbidden to talk on the phone in the cinema.
→ You mustn't talk on the phone in the cinema.
