Viết lại câu sao cho nghĩa không đổi: Mary is one of the smartest pupils in my class, do you know her? People in the mountainous areas have nothing for entertainment at ningt but televisions

Viết lại câu sao cho nghĩa không đổi 
--Mary is one of the smartest pupils in my class . do you know her ?
= do you know........................
---People in the mountainous areas have nothing for entertainment at ningt but televisions
= If there weren't ..........