Change from active into passive.

Решение:

1. My parents don't allow me to get a Saturday job. → I am not allowed to get a Saturday job by my parents.
2. Our friends often invite us to parties. → We are often invited to parties by our friends.
3. The teacher explained the rules in the lesson. → The rules were explained in the lesson by the teacher.
4. They will use the radio to announce the winners of the competition. → The radio will be used to announce the winners of the competition by them.
5. He bought his school uniform a few months ago. → His school uniform was bought a few months ago by him.