Choose the correct options to complete the sentences.
1. Tim, do you think violent sports ___(was able to;should;shall) be banned?2. I strongly believe violent games ___ (must;might;could) be banned.3. I think such aggressive activities ___ (don't have to;might not;mustn't) help people to live together peacefully.4. We ___ (ought;could have;could) at least improve safety standards of such kinds of sport.5. He ___(can;may;has to) ski really well, despite his recent injury.6. People who take part in violent sports ___(have to;may;would) risk receiving serious injury.7.We ___(need to;ought;has to) provide better protective clothing.8. This way, serious injuries ___(has to;shall;would) be reduced.