6. Ken has the same mobile phone as me. 

7. The price of  food is the same as it was as yesterday.

8. My mom likes cooking and my sisters like it too

9. My sister didn't go to the gallery yesterday,I didn't either.

10.Folk music is not as exciting as rock and roll music

6. has/Ken/mobile/as/the same/phone/me.

⇒Ken has the same mobile phone as me.

7. The/of/is/the/price/was/as/same/food/it/yesterday.

⇒The price of food is the same as it was yesterday. 

8. likes/like/cooking,/and/my sisters/My mom/it/too.

⇒My mom likes cooking and my sisters like it, too.

9. My/didn’t/the art/sister/gallery/didn’t/go to/yesterday,/I/and/either.

⇒My sister didn't do to the art gallery and I didn't, either.

10. Folk/exciting/is/as/as/rock and roll/music/not//music.

⇒Folk music is not as exciting as rock and roll music.