Explicație:
1. Tania practiced for her piano recital all week
2. Is Jimmy taking english lessons for four years?
3. How long is Jenny writing children books?
4. We planted flowers all afternoon
5. Pam is driving since she was 17 years old.
6. Are Peter and Paul watching TV all weekend?
7. It rained for 2 days.
8. They are shopping since 9:00 this morning.
