Pretvori stavke iz tvornika v trpnik (vključno s posebnim strukturami v trpniku). / Transform the sentences from active to passive voice (including special passive structures).
1 We suppose that endless hours of practice is the only way to achieve a good result in the competition.
Endless hours of practice ____________________________________________________________.
2 Most professional athletes aren’t using illegal substances.
3 The advantages of participating in sports activities largely outweigh its downsides.
___________________________________________________________________ its advantages.
4 They should ban all kinds of doping in professional sports.
_____________________________________________________________ in professional sports.
5 Some people believe that talent is the key to success.
_______________________________________________________ that talent is the key to success.
6 In his desire to be the best, he has dedicated his whole life to hard training.
In his desire to be the best, __________________________________________________________.