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
birds eat crops and insects.
animals can run, hunt and hide. (вообще вопрос не очень таки корректный, ибо животные много чего могут делать)
birds can fly in the sky .
третий вопрос абсурден.