1. was his sister a model?
his sister wasn't a model
2. did masha read magazine?
masha didn't read magazine
3. were they students?
they weren't students
4. did this shop opened at 9 o'clock?
this shop didn't opened at 9 o'clock
5. was she pretty?
she wasn't pretty
6. did tom lied?
7. tom didn't lied
7. did marina wore skirts?
marina didn't wore skirts