1. – what are you doing? – i'm repairing my son's bicycle. i (do) it for two hours. 2. i'll call for an ambulance. she (get) weaker and weaker since she had breakfast. 3. hurry up, john. i'm waiting for you. you (have a bath) for an hour. 4. who is that man standing on the comer? he (stand) there for the last half an hour. 5. where is dad? i (wait) for him since 6 p.m. we are going to be late to the concert. 6. i can't stand it any more. those people (quarrel) since breakfast. 7. – jim works as a sales manager. – really? – he (sell) washing machines for three months. 8. dora is playing the piano. she (play) the piano since i came. 9. aren't you going to tell me what (you / do) in my absence? 10. how long you (sit) here? 11. michael, i (try) to get you all day! 12. i'll go and wash my eyes. i don't want my husband to see i (cry). 13. the amount of crime (increase) for the last ten years and we can't stop this process.
