Только номер 4.ПОЖАЛУЙСТА...

Ответ:

Объяснение:

1. He to be going to be an actor.  - He going to be an actor.

2. My mother is going visit my exhibition. -My mother is going to visit my exhibition.

3. What language you are going to study? -What language are you going to study?

4. I not going to be a singer.- I'm not going to be a singer

5. Sam be going be a reporter. -Sam going to be a reporter