State verb or action verb?

He can't answer the phone because he ___________ (work) on his computer

He __________ (love) spending time with his grandparents

They _________ (believe) in hard work, so they ___________ (wake up) early in the morning

This book ____________ (belong) to my sister

They _________ (prefer) staying at home, but today they ___________ (go out) to celebrate

He ____________ (not believe) in luck, but he still ___________ (carry) a small charm in his wallet for good fortune

We _________ (understand) the instructions, but we ___________ (check) them again to be sure

He ___________ (cook) dinner every evening

They _________ (remember) the last time this happened, that's why they ___________ (be) so cautious now

She _________ (know) the answer, but she _________ (not say) anything

That idea ___________ (sound) interesting

She _________ (feel) that the project is important, so she __________ (work) overtime to make sure everything is perfect is

He __________ (seem) tired, but he __________ (help) his friend anyway

He __________ (open) the window to let in some fresh air

She __________ (not like) loud music, so she _________ (wear) headphones

I ___________ (not understand) why you're upset