Help plis I__ play the piano when I was 5, but now I can 1can 2could 3couldn't cannot …

Help plis
I__ play the piano when I was 5, but now I can
1can
2could
3couldn't
cannot
cat eat__than dogs
1many
2 much
most
more
my great-grandpa was the__footballer in his town
1famous
2most famous
more famous
4famouses
I put___sugar in my tea, perhaps. It's too sweet
1 much
2many
3any
no