Hello, all. I need your help.
- My hands are muddy because I __________ some flowers.
a. have planted
b. have been planting
"Aim High" (a book is published by Oxford university press, and the curriculum I teach) says that ONLY the present perfect continuous is possible. I wonder why we don't use the present perfect simple in such a context, i.e. there is an influence in the present (my hands are muddy). Furthermore, there's no indication that the action is in progress nor completed. Can we use BOTH?
Thanks in advance 🌹