Ответ:
- 1. I walk to work every day, but today I am taking the bus.
- 2. I eat vegetables every day.
- 3. They play volleyball every Saturday.
- 4. We go windsurfing in the summer.
- 5. My brother plays darts while I play chess.
- 6. I read a book every evening before I meet friends.
Обоснование: Используется Present Simple для регулярных, повторяющихся действий ('every day', 'every evening') и Present Continuous для действий, происходящих в данный момент или в настоящее время ('today I am taking').