Circle the mistake (A or B), then correct it. 1 Frank has done his homework and then listened to music. 2 The children have put away their toys but they didn't make their beds yet. 3 Jim learned a lot since he started the language course. 4 Fatima has finished her lunch and then she went out to play. 5 They haven't seen each other since September when they have met at Mary's party. 6 Ryan has bought a new MP3 player yesterday but I haven't seen it yet. 7 The hockey player hit his head on Friday and he was in hospital since then.