Fill in the blanks with the correct modal
Our parents say we ____ watch TV after we've finished our studies

can

The correct modal to fill in the blank is can. The modal can is used to express ability, and it is the most appropriate modal to use in this context because it conveys the idea that we are allowed to watch TV after we have finished our studies. Our parents are not saying that we should watch TV, or that we might watch TV, but that we can watch TV if we want to.