Решение:
- We are meeting Paul at three o'clock this afternoon. (Present continuous for future arrangements).
- Dan has never ridden a bike. (Present perfect for past experience, 'never' used).
- I don't think we will win the match tomorrow. (Simple future for prediction in the negative).
- Remember! Classes start at ten o'clock tomorrow! (Simple present for timetables/scheduled events).
- My sister will study medicine at university next year. (Simple future for a prediction).
Ответ: 1. are meeting; 2. has never ridden; 3. will win; 4. start; 5. will study