She has to write a report on driving instructor courses

My best friend Caroline has been very busy recently. She didn"t have time to answer my phones and when she did we usually spoke for a few second only. She told me that she was very busy with writing her report for school. She didn"t even had time to explain what the report was about. So finally I decided to visit her without informing her that I was going to come. I got into my car and drove to her home. When I arrived, I knocked at the door waiting for her to open. But her mum opened saying that Caroline was in her room studying very hard. But she let me in. I went upstairs to her room, knocked at the door and simply entered. Caroline was sitting alone reading a book and making notes on a piece of paper. She saw me, so she stopped working and smiled saying hello. I asked her what was wrong that she had been so busy and then she showed me the book she was reading about driving instructor courses in our country and the notes she was making. Caroline needed it immediately for school. She told me that she had to write a report on driving instructor courses in our country to get a credit. I told her that she should have told me earlier that she had to write a report on driving instructor courses in our country. I could have helped her. I could have prepared some information on driving instructor courses in our country. So we started to do it together and we managed to finish the report in two days. Caroline was very happy.