G:
1. (-) you don't know the answer
(?) do you know the answer?
2. (-) he hasn't breakfast at 8 o'clock
(?) has he the breakfast at 8 o'clock?
3. Тут наверное ошибка, тк предложение и так уже положительное.
(-) some schoolgirls don't wear uniforms
(?) do some schoolgirls wear uniforms?
4. (+) she cut her husband's hear
(-) she doesn't cut her husband's hair
5. (-) she doesn't do her homework everyday
(?) does she do her homework everyday?