5. Rewrite each sentence using a modal verb of obligation, prohibition or advice.

Решение:

• 1. It is not necessary to have experience to do the job. -> You don't have to have experience to do the job. (Используем 'don't have to' для выражения отсутствия необходимости).
• 2. It is obligatory for doctors to wash their hands. -> Doctors must wash their hands. (Используем 'must' для выражения обязательства).
• 3. It is a good idea for journalists to learn a foreign language. -> Journalists should learn a foreign language. (Используем 'should' для выражения совета).
• 4. In our school, we are not allowed to run in the corridor. -> In our school, we mustn't run in the corridor. (Используем 'mustn't' для выражения запрета).
• 5. It isn't a good idea to use informal language in a job interview. -> You shouldn't use informal language in a job interview. (Используем 'shouldn't' для выражения совета против чего-либо).
• 6. It is not obligatory for students to wear a tie here. -> Students don't have to wear a tie here. (Используем 'don't have to' для выражения отсутствия необходимости).
• 7. It is essential for firefighters to stay calm. -> Firefighters must stay calm. (Используем 'must' для выражения сильной необходимости/обязательства).

Ответ:

1. You don't have to have experience to do the job.
2. Doctors must wash their hands.
3. Journalists should learn a foreign language.
4. In our school, we mustn't run in the corridor.
5. You shouldn't use informal language in a job interview.
6. Students don't have to wear a tie here.
7. Firefighters must stay calm.