Вставте can/ can't или could/ couldn't
When I was young I COULD play sport
but I _______ dance well. Now I'm
old, I ________ climb the stairs,
but I __________ sit in my armchair
and watch TV.

When I was young I COULD play sportbut I couldn't dance well. Now I'm old, I  can't climb the stairs,but I can sit in my armchairand watch TV.