Last weekend в начале каждого предложения добавьте. Первое не пишу так как оно дано в качестве образцаю
I worked in the garden. I walked with my dog. I listened to music. I cleaned my room. I watched a new film in the cinema. I played computer games. I enjoyed a good book. I helped my mother about the house. I watched television. I played the piano. I went by roller-skate. I washed up.