Ответ:

2a.

Nameplay the pianoclimb a treeride a horseuse a computer
Markcancancan'tcan
Sallycan'tcancancan't
Petercan'tcan'tcancan
Briancancancan'tcan
Megcan'tcan'tcan'tcan

Mark can play the piano, climb a tree and use a computer, but he can't ride a horse.

Sally can't play the piano or use a computer, but she can climb a tree and ride a horse.

Peter can't play the piano or climb a tree, but he can ride a horse and use a computer.

Brian can play the piano, climb a tree and use a computer, but he can't ride a horse.

Meg can use a computer, but she can't play the piano, climb a tree or ride a horse.

2b. Возможный вариант:

Five years ago, I couldn't swim. I couldn't ride a bike. I couldn't use a computer.

In five years, I will be able to drive a car. I will be able to speak English fluently. I will be able to travel alone.