Răspuns:
15: 1-c; 2-e; 3-b; 4-a; 5-d
16: 1. at our school students don't have to wear a uniform
2. students shouldn't use social Media everyday
3. our coach says we mustn't eat before a match.
4. you don't have to have a password to use the Wi-Fi
5. we don't have to be quiet
6. I can't call you tonight
7. you shouldn't close your social Media account
8. students don't have to pay to use the pool
9. they can't take drinks into the classroom
