1. We eat ice cream every Tuesday - present simple
2. Do they play on weekdays? - No, they don't play on weekdays, they play on weekends. - present simple
3. Do you cook dinner every Saturday? - present simple
4. What are you watching now? - I'm watching a TV series - present continuous
5. How long has she been doing her homework? - She has been doing her homework for about two hours - Present Perfect Continuous
(или если ещё не изучали - вот альтернативный вариант: How long is she doing homework? - She is doing homework for about two hours - Present Continuous)
6. Did you clean up yesterday? - past simple - No, I will do it tomorrow - future simple
7. I was playing computer games - past continuous - , when my relatives returned - past simple