Помогите сделать английский!Choose the correct verb form.1. How long has Omar been studying\does he study\ at school #15?2. My friend has been looking\looked\ for a bike for 3 weeks.3. I whore\have been writing\ this exercise since 4 o'clock p.m.4. I am tired because I wrote\have been writing\ this exercise since 4 o'clock p.m.5. My friend is working\has been working\ as an air hostess since last month.6. I have bought\bought\ a dictionary a few months ago.