Read these sentences and fill in the gaps with 'could', 'can', 'couldn't', 'can't'. 1. Mary tried hard to persuade her friend but she ... change her mind.
2. I ... finally talk to John after I tried to reach him on the phone for hours.
3 We... choose our opponents.
The teams will be matched randomly.
1. Mary tries hard to persuade her friend but she couldn't change her mind.
2. I can finally talk to John after I tried to reach him on the phone for hours.
3. We can't choose our opponents. The teams are matched randomly.