1 Endless hours of practice is supposed to be the only way to achieve a good result in the competition.

2 Illegal substances aren’t being used by most professional athletes.

3 The downsides of participating in sports activities are largely outweighed by its advantages.

4 All kinds of doping should be banned in professional sports.

5 It is believed that talent is the key to success.

6 In his desire to be the best, his whole life has been dedicated to hard training.