I.
1. Tutor
2. Overtime
3. Bring up
4. Uniform
5. Salary
6. Deadlines
7. Cashier
II. 1) This pizza delivery boy was talking on the phone when I called him.
2) He is a computer prgrammer and yesterday he was working on a new project.
3) Our friend, who is a lion tamer was practicing in the cage when we were hanging out together.
4) The reason the pizza delivery boy was late is because he was standing in a traffic jam.
5) Yesterday my co-worker, a computer programmer, was designing a new program when his computer started malfunctioning.
1) The reason he became an artist is because he had spent 4 years going through an arts school, however he wasn't passionate about his job at all.
2) This writer had written many poems before the start of the 21st century.
3) He had spent 2 years in an IT company before he became a mechanic.
4) Yesterday, before we started cooking, the mechanic had repaired the sink.
5) Before the birthday of my mother came up, an artist had helped me make a painting as a birthday gift for her.
III. 1) - Oh god, I didn't expect to hear that. When arghe you going to come back?
2) - That's amazing! Congratulations!
3) - Really? I feel terrible about that. Why hadn't you told me before?
4) I'm so sorry to hear that.
IV. 1) Had been working
2) Had been waiting
3) Had played
4) Had been working
5) Had already swept
