Respuesta:
1. I am planting a tree now.
2. My sister is watching TV in the living room.
3. Children are watering the plants.
4. They are writing a letter.
5. We are swimming in the pool.
6. My sisters are riding their bikes.
7. She is talking on the phone now.
8. I am not reading a magazine at the moment.
9. She is not running in the garden.
10. The students are not studying.
11. We are not cooking in the kitchen.
12. I am not watching TV.
13. Is she cooking?
14. Are they walking in the forest?
15. Are you writing a story?
16. Is your brother driving?
