按要求完成下列各句。

1. His mother doesn't allow him to get his ears pierced.(改为被动语态)

    He _____to get his ears pierced.

2. He thinks he can pass the exam.(改为否定句)

    He _____think he_____ pass the exam.

3. I don't think sixteen-year-olds should be allowed to drive.(改为反意疑问句)

    I don't think sixteen-year-olds should be allowed to drive, _____ ?

4. Alice is too young to go to school.(改为同义句)

    Alice isn't _____to go to school.

5. Nobody can answer the question.(改为被动语态)

    The question_____ answered by anybody.