2. ...should talk...
3. ...mustn't eat...
4. ...shouldn't talk and eat...
5. ...mustn't use...
Объяснение:
It isn't OK to talk in the library
you must be quiet in the library
It's against the rules to eat sandwiches in the classroom.
We mustn't eat sandwiches in the classroom
It isn't a good idea to talk and eat at the same time
You shouldn't eat and talk at the same time.
You can't use your mobile during a test
You mustn't use your mobile during a test
Объяснение:
сорри если не правильно
