2.1 1) I can swim well.
2) Cats can see in the dark.
3) I can't speak Arabic.
4) Penguins can't fly.
5) Matt can run fast.
6) I can't play the piano.
2.2
1) Can you swim well? Yes, I can.
2) Can cats see in the dark? Yes, they can.
3) Can you speak Arabic? No, I can't.
4) Can penguins fly? No, they can't.
5) Can Matt run fast? Yes, he can.
6) Can you play piano? No, I can't.