4 In your notebook, complete the questions and short answers. 1 (you / swim) Can you swim? No, I can't. 2 (David / sing) this song? Yes, . He's very good. 3 (the boys / act) ? No, ! 4 Mum, (we / play) a computer game? No, . It's time for lunch. 5 (you / see) Mario? Yes, . He's over there.