1. They are planting trees. They have been planting them since the morning. They always plant trees in October. They have already planted several hundred trees this year. 2Ann is having her music lesson now. She has her music lessons twice a week. 3. I have done all my home exercises already. 4. At last I have found the book I need. I have looked for it a quarter of an hour. 5. Helen is reading an English book. She works at her English every day. She has been learning this language for three years. She has read many English stories this year.