Did the student get skills after training?
Who got skills after training?
What did the student get after training?
Did the student get skills after training or studying?
The student got skills after training, didn't he?
were they invited to take part in different competitions?
Who was invited to take part in different competitions.
For what were they invited?
They were invited to take part in different competitions,weren't they?
were they invited to take part in different competitions or to visit the country?